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Finding the Fourth Proportional to 28,401.78, 42,601.12 and 8,680.33

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Solution

The fourth proportional to 28,401.78, 42,601.12 and 8,680.33 is: 13,020.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,401.78 : 42,601.12 = 8,680.33 : x
  2. Step 2: Convert to fraction form
    28,401.78/42,601.12 = 8,680.33/x
  3. Step 3: Cross multiply
    28,401.78x = 42,601.12 × 8,680.33
  4. Step 4: Simplify right side
    28,401.78x = 369,791,779.97
  5. Step 5: Solve for x
    x = 369,791,779.97/28,401.78
  6. Step 6: Final answer
    x = 13,020.02

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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.