Home / 21,780.70-32,638.28-16,207.90

Finding the Fourth Proportional to 21,780.70, 32,638.28 and 16,207.90

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Solution

The fourth proportional to 21,780.70, 32,638.28 and 16,207.90 is: 24,287.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,780.70 : 32,638.28 = 16,207.90 : x
  2. Step 2: Convert to fraction form
    21,780.70/32,638.28 = 16,207.90/x
  3. Step 3: Cross multiply
    21,780.70x = 32,638.28 × 16,207.90
  4. Step 4: Simplify right side
    21,780.70x = 528,997,978.41
  5. Step 5: Solve for x
    x = 528,997,978.41/21,780.70
  6. Step 6: Final answer
    x = 24,287.46

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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.