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Finding the Fourth Proportional to 28,013.92, 42,014.88 and 8,292.64

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Solution

The fourth proportional to 28,013.92, 42,014.88 and 8,292.64 is: 12,437.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,013.92 : 42,014.88 = 8,292.64 : x
  2. Step 2: Convert to fraction form
    28,013.92/42,014.88 = 8,292.64/x
  3. Step 3: Cross multiply
    28,013.92x = 42,014.88 × 8,292.64
  4. Step 4: Simplify right side
    28,013.92x = 348,414,274.48
  5. Step 5: Solve for x
    x = 348,414,274.48/28,013.92
  6. Step 6: Final answer
    x = 12,437.18

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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.