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Finding the Fourth Proportional to 22,555.64, 31,129.47 and 13,124.19

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Solution

The fourth proportional to 22,555.64, 31,129.47 and 13,124.19 is: 18,112.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,555.64 : 31,129.47 = 13,124.19 : x
  2. Step 2: Convert to fraction form
    22,555.64/31,129.47 = 13,124.19/x
  3. Step 3: Cross multiply
    22,555.64x = 31,129.47 × 13,124.19
  4. Step 4: Simplify right side
    22,555.64x = 408,549,078.88
  5. Step 5: Solve for x
    x = 408,549,078.88/22,555.64
  6. Step 6: Final answer
    x = 18,112.95

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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.