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Finding the Fourth Proportional to 28,988.60, 40,005.42 and 16,412.60

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Solution

The fourth proportional to 28,988.60, 40,005.42 and 16,412.60 is: 22,650.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,988.60 : 40,005.42 = 16,412.60 : x
  2. Step 2: Convert to fraction form
    28,988.60/40,005.42 = 16,412.60/x
  3. Step 3: Cross multiply
    28,988.60x = 40,005.42 × 16,412.60
  4. Step 4: Simplify right side
    28,988.60x = 656,592,956.29
  5. Step 5: Solve for x
    x = 656,592,956.29/28,988.60
  6. Step 6: Final answer
    x = 22,650.04

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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.