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Finding the Fourth Proportional to 13,331.70, 19,987.95 and 7,490.10

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Solution

The fourth proportional to 13,331.70, 19,987.95 and 7,490.10 is: 11,229.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,331.70 : 19,987.95 = 7,490.10 : x
  2. Step 2: Convert to fraction form
    13,331.70/19,987.95 = 7,490.10/x
  3. Step 3: Cross multiply
    13,331.70x = 19,987.95 × 7,490.10
  4. Step 4: Simplify right side
    13,331.70x = 149,711,744.30
  5. Step 5: Solve for x
    x = 149,711,744.30/13,331.70
  6. Step 6: Final answer
    x = 11,229.76

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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.