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Finding the Fourth Proportional to 28,080.40, 42,169.20 and 14,958.40

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Solution

The fourth proportional to 28,080.40, 42,169.20 and 14,958.40 is: 22,463.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,080.40 : 42,169.20 = 14,958.40 : x
  2. Step 2: Convert to fraction form
    28,080.40/42,169.20 = 14,958.40/x
  3. Step 3: Cross multiply
    28,080.40x = 42,169.20 × 14,958.40
  4. Step 4: Simplify right side
    28,080.40x = 630,783,761.28
  5. Step 5: Solve for x
    x = 630,783,761.28/28,080.40
  6. Step 6: Final answer
    x = 22,463.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.