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Finding the Fourth Proportional to 21,581.10, 32,377.02 and 21,223.53

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Solution

The fourth proportional to 21,581.10, 32,377.02 and 21,223.53 is: 31,840.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,581.10 : 32,377.02 = 21,223.53 : x
  2. Step 2: Convert to fraction form
    21,581.10/32,377.02 = 21,223.53/x
  3. Step 3: Cross multiply
    21,581.10x = 32,377.02 × 21,223.53
  4. Step 4: Simplify right side
    21,581.10x = 687,154,655.28
  5. Step 5: Solve for x
    x = 687,154,655.28/21,581.10
  6. Step 6: Final answer
    x = 31,840.58

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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.