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Finding the Fourth Proportional to 22,465.52, 30,969.60 and 15,729.92

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Solution

The fourth proportional to 22,465.52, 30,969.60 and 15,729.92 is: 21,684.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,465.52 : 30,969.60 = 15,729.92 : x
  2. Step 2: Convert to fraction form
    22,465.52/30,969.60 = 15,729.92/x
  3. Step 3: Cross multiply
    22,465.52x = 30,969.60 × 15,729.92
  4. Step 4: Simplify right side
    22,465.52x = 487,149,330.43
  5. Step 5: Solve for x
    x = 487,149,330.43/22,465.52
  6. Step 6: Final answer
    x = 21,684.31

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1.5x scale

Why These Related Problems?

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