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Finding the Fourth Proportional to 21,697.68, 32,545.15 and 6,917.21

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Solution

The fourth proportional to 21,697.68, 32,545.15 and 6,917.21 is: 10,375.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,697.68 : 32,545.15 = 6,917.21 : x
  2. Step 2: Convert to fraction form
    21,697.68/32,545.15 = 6,917.21/x
  3. Step 3: Cross multiply
    21,697.68x = 32,545.15 × 6,917.21
  4. Step 4: Simplify right side
    21,697.68x = 225,121,637.03
  5. Step 5: Solve for x
    x = 225,121,637.03/21,697.68
  6. Step 6: Final answer
    x = 10,375.38

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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.