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Finding the Fourth Proportional to 8,641.80, 12,935.88 and 6,984.48

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Solution

The fourth proportional to 8,641.80, 12,935.88 and 6,984.48 is: 10,455.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,641.80 : 12,935.88 = 6,984.48 : x
  2. Step 2: Convert to fraction form
    8,641.80/12,935.88 = 6,984.48/x
  3. Step 3: Cross multiply
    8,641.80x = 12,935.88 × 6,984.48
  4. Step 4: Simplify right side
    8,641.80x = 90,350,395.14
  5. Step 5: Solve for x
    x = 90,350,395.14/8,641.80
  6. Step 6: Final answer
    x = 10,455.04

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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.