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Finding the Fourth Proportional to 8,649.15, 12,966.72 and 7,957.20

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Solution

The fourth proportional to 8,649.15, 12,966.72 and 7,957.20 is: 11,929.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,649.15 : 12,966.72 = 7,957.20 : x
  2. Step 2: Convert to fraction form
    8,649.15/12,966.72 = 7,957.20/x
  3. Step 3: Cross multiply
    8,649.15x = 12,966.72 × 7,957.20
  4. Step 4: Simplify right side
    8,649.15x = 103,178,784.38
  5. Step 5: Solve for x
    x = 103,178,784.38/8,649.15
  6. Step 6: Final answer
    x = 11,929.36

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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.