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Finding the Fourth Proportional to 21,697, 32,545.52 and 5,281

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Solution

The fourth proportional to 21,697, 32,545.52 and 5,281 is: 7,921.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,697 : 32,545.52 = 5,281 : x
  2. Step 2: Convert to fraction form
    21,697/32,545.52 = 5,281/x
  3. Step 3: Cross multiply
    21,697x = 32,545.52 × 5,281
  4. Step 4: Simplify right side
    21,697x = 171,872,891.12
  5. Step 5: Solve for x
    x = 171,872,891.12/21,697
  6. Step 6: Final answer
    x = 7,921.50

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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.