Home / 20,725.52-28,612.60-15,432.98

Finding the Fourth Proportional to 20,725.52, 28,612.60 and 15,432.98

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Solution

The fourth proportional to 20,725.52, 28,612.60 and 15,432.98 is: 21,305.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,725.52 : 28,612.60 = 15,432.98 : x
  2. Step 2: Convert to fraction form
    20,725.52/28,612.60 = 15,432.98/x
  3. Step 3: Cross multiply
    20,725.52x = 28,612.60 × 15,432.98
  4. Step 4: Simplify right side
    20,725.52x = 441,577,683.55
  5. Step 5: Solve for x
    x = 441,577,683.55/20,725.52
  6. Step 6: Final answer
    x = 21,305.99

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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.