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Finding the Fourth Proportional to 8,457.10, 12,669.84 and 7,079.29

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Solution

The fourth proportional to 8,457.10, 12,669.84 and 7,079.29 is: 10,605.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,457.10 : 12,669.84 = 7,079.29 : x
  2. Step 2: Convert to fraction form
    8,457.10/12,669.84 = 7,079.29/x
  3. Step 3: Cross multiply
    8,457.10x = 12,669.84 × 7,079.29
  4. Step 4: Simplify right side
    8,457.10x = 89,693,471.61
  5. Step 5: Solve for x
    x = 89,693,471.61/8,457.10
  6. Step 6: Final answer
    x = 10,605.70

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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.