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Finding the Fourth Proportional to 28,988.80, 40,002.64 and 16,414.40

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Solution

The fourth proportional to 28,988.80, 40,002.64 and 16,414.40 is: 22,650.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,988.80 : 40,002.64 = 16,414.40 : x
  2. Step 2: Convert to fraction form
    28,988.80/40,002.64 = 16,414.40/x
  3. Step 3: Cross multiply
    28,988.80x = 40,002.64 × 16,414.40
  4. Step 4: Simplify right side
    28,988.80x = 656,619,334.02
  5. Step 5: Solve for x
    x = 656,619,334.02/28,988.80
  6. Step 6: Final answer
    x = 22,650.79

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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.