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Finding the Fourth Proportional to 19,693.55, 29,560.37 and 9,839.90

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Solution

The fourth proportional to 19,693.55, 29,560.37 and 9,839.90 is: 14,769.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,693.55 : 29,560.37 = 9,839.90 : x
  2. Step 2: Convert to fraction form
    19,693.55/29,560.37 = 9,839.90/x
  3. Step 3: Cross multiply
    19,693.55x = 29,560.37 × 9,839.90
  4. Step 4: Simplify right side
    19,693.55x = 290,870,887.76
  5. Step 5: Solve for x
    x = 290,870,887.76/19,693.55
  6. Step 6: Final answer
    x = 14,769.86

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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.