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Finding the Fourth Proportional to 8,691.23, 13,012.18 and 7,288.81

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Solution

The fourth proportional to 8,691.23, 13,012.18 and 7,288.81 is: 10,912.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,691.23 : 13,012.18 = 7,288.81 : x
  2. Step 2: Convert to fraction form
    8,691.23/13,012.18 = 7,288.81/x
  3. Step 3: Cross multiply
    8,691.23x = 13,012.18 × 7,288.81
  4. Step 4: Simplify right side
    8,691.23x = 94,843,256.95
  5. Step 5: Solve for x
    x = 94,843,256.95/8,691.23
  6. Step 6: Final answer
    x = 10,912.52

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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.