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Finding the Fourth Proportional to 8,861.66, 12,242.31 and 7,157.62

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Solution

The fourth proportional to 8,861.66, 12,242.31 and 7,157.62 is: 9,888.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,861.66 : 12,242.31 = 7,157.62 : x
  2. Step 2: Convert to fraction form
    8,861.66/12,242.31 = 7,157.62/x
  3. Step 3: Cross multiply
    8,861.66x = 12,242.31 × 7,157.62
  4. Step 4: Simplify right side
    8,861.66x = 87,625,802.90
  5. Step 5: Solve for x
    x = 87,625,802.90/8,861.66
  6. Step 6: Final answer
    x = 9,888.19

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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.