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Finding the Fourth Proportional to 21,681.31, 32,522.91 and 7,459.58

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Solution

The fourth proportional to 21,681.31, 32,522.91 and 7,459.58 is: 11,189.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,681.31 : 32,522.91 = 7,459.58 : x
  2. Step 2: Convert to fraction form
    21,681.31/32,522.91 = 7,459.58/x
  3. Step 3: Cross multiply
    21,681.31x = 32,522.91 × 7,459.58
  4. Step 4: Simplify right side
    21,681.31x = 242,607,248.98
  5. Step 5: Solve for x
    x = 242,607,248.98/21,681.31
  6. Step 6: Final answer
    x = 11,189.70

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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.