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Finding the Fourth Proportional to 8,685.56, 12,972.08 and 7,519.16

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Solution

The fourth proportional to 8,685.56, 12,972.08 and 7,519.16 is: 11,230.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,685.56 : 12,972.08 = 7,519.16 : x
  2. Step 2: Convert to fraction form
    8,685.56/12,972.08 = 7,519.16/x
  3. Step 3: Cross multiply
    8,685.56x = 12,972.08 × 7,519.16
  4. Step 4: Simplify right side
    8,685.56x = 97,539,145.05
  5. Step 5: Solve for x
    x = 97,539,145.05/8,685.56
  6. Step 6: Final answer
    x = 11,230.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.