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Finding the Fourth Proportional to 12,666.70, 19,003.71 and 3,902.90

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Solution

The fourth proportional to 12,666.70, 19,003.71 and 3,902.90 is: 5,855.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,666.70 : 19,003.71 = 3,902.90 : x
  2. Step 2: Convert to fraction form
    12,666.70/19,003.71 = 3,902.90/x
  3. Step 3: Cross multiply
    12,666.70x = 19,003.71 × 3,902.90
  4. Step 4: Simplify right side
    12,666.70x = 74,169,560.24
  5. Step 5: Solve for x
    x = 74,169,560.24/12,666.70
  6. Step 6: Final answer
    x = 5,855.48

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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.