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Finding the Fourth Proportional to 8,728.50, 12,040.65 and 6,071.29

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Solution

The fourth proportional to 8,728.50, 12,040.65 and 6,071.29 is: 8,375.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,728.50 : 12,040.65 = 6,071.29 : x
  2. Step 2: Convert to fraction form
    8,728.50/12,040.65 = 6,071.29/x
  3. Step 3: Cross multiply
    8,728.50x = 12,040.65 × 6,071.29
  4. Step 4: Simplify right side
    8,728.50x = 73,102,277.94
  5. Step 5: Solve for x
    x = 73,102,277.94/8,728.50
  6. Step 6: Final answer
    x = 8,375.12

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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.