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Finding the Fourth Proportional to 19,842.39, 29,724.71 and 8,722.71

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Solution

The fourth proportional to 19,842.39, 29,724.71 and 8,722.71 is: 13,066.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,842.39 : 29,724.71 = 8,722.71 : x
  2. Step 2: Convert to fraction form
    19,842.39/29,724.71 = 8,722.71/x
  3. Step 3: Cross multiply
    19,842.39x = 29,724.71 × 8,722.71
  4. Step 4: Simplify right side
    19,842.39x = 259,279,981.55
  5. Step 5: Solve for x
    x = 259,279,981.55/19,842.39
  6. Step 6: Final answer
    x = 13,066.97

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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.