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Finding the Fourth Proportional to 31,002.39, 42,707.36 and 22,479.47

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Solution

The fourth proportional to 31,002.39, 42,707.36 and 22,479.47 is: 30,966.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,002.39 : 42,707.36 = 22,479.47 : x
  2. Step 2: Convert to fraction form
    31,002.39/42,707.36 = 22,479.47/x
  3. Step 3: Cross multiply
    31,002.39x = 42,707.36 × 22,479.47
  4. Step 4: Simplify right side
    31,002.39x = 960,038,491.97
  5. Step 5: Solve for x
    x = 960,038,491.97/31,002.39
  6. Step 6: Final answer
    x = 30,966.60

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.