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Finding the Fourth Proportional to 21,400.68, 32,220.03 and 18,543

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Solution

The fourth proportional to 21,400.68, 32,220.03 and 18,543 is: 27,917.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,400.68 : 32,220.03 = 18,543 : x
  2. Step 2: Convert to fraction form
    21,400.68/32,220.03 = 18,543/x
  3. Step 3: Cross multiply
    21,400.68x = 32,220.03 × 18,543
  4. Step 4: Simplify right side
    21,400.68x = 597,456,016.29
  5. Step 5: Solve for x
    x = 597,456,016.29/21,400.68
  6. Step 6: Final answer
    x = 27,917.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.