Home / 12,777,428.80-19,166,143.20-7,994,459.80

Finding the Fourth Proportional to 12,777,428.80, 19,166,143.20 and 7,994,459.80

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Solution

The fourth proportional to 12,777,428.80, 19,166,143.20 and 7,994,459.80 is: 11,991,689.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,777,428.80 : 19,166,143.20 = 7,994,459.80 : x
  2. Step 2: Convert to fraction form
    12,777,428.80/19,166,143.20 = 7,994,459.80/x
  3. Step 3: Cross multiply
    12,777,428.80x = 19,166,143.20 × 7,994,459.80
  4. Step 4: Simplify right side
    12,777,428.80x = 153,222,961,333,443.34
  5. Step 5: Solve for x
    x = 153,222,961,333,443.34/12,777,428.80
  6. Step 6: Final answer
    x = 11,991,689.70

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.