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Finding the Fourth Proportional to 15,432.88, 21,245.88 and 14,727.64

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Solution

The fourth proportional to 15,432.88, 21,245.88 and 14,727.64 is: 20,275.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,432.88 : 21,245.88 = 14,727.64 : x
  2. Step 2: Convert to fraction form
    15,432.88/21,245.88 = 14,727.64/x
  3. Step 3: Cross multiply
    15,432.88x = 21,245.88 × 14,727.64
  4. Step 4: Simplify right side
    15,432.88x = 312,901,672.12
  5. Step 5: Solve for x
    x = 312,901,672.12/15,432.88
  6. Step 6: Final answer
    x = 20,275.00

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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.