Home / 12,817.80-19,226.70-5,420.34

Finding the Fourth Proportional to 12,817.80, 19,226.70 and 5,420.34

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Solution

The fourth proportional to 12,817.80, 19,226.70 and 5,420.34 is: 8,130.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,817.80 : 19,226.70 = 5,420.34 : x
  2. Step 2: Convert to fraction form
    12,817.80/19,226.70 = 5,420.34/x
  3. Step 3: Cross multiply
    12,817.80x = 19,226.70 × 5,420.34
  4. Step 4: Simplify right side
    12,817.80x = 104,215,251.08
  5. Step 5: Solve for x
    x = 104,215,251.08/12,817.80
  6. Step 6: Final answer
    x = 8,130.51

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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.