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Finding the Fourth Proportional to 19,892.90, 29,842.78 and 9,898.32

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Solution

The fourth proportional to 19,892.90, 29,842.78 and 9,898.32 is: 14,849.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,892.90 : 29,842.78 = 9,898.32 : x
  2. Step 2: Convert to fraction form
    19,892.90/29,842.78 = 9,898.32/x
  3. Step 3: Cross multiply
    19,892.90x = 29,842.78 × 9,898.32
  4. Step 4: Simplify right side
    19,892.90x = 295,393,386.13
  5. Step 5: Solve for x
    x = 295,393,386.13/19,892.90
  6. Step 6: Final answer
    x = 14,849.19

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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.