Home / 21,432.60-32,154-8,945.70

Finding the Fourth Proportional to 21,432.60, 32,154 and 8,945.70

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Solution

The fourth proportional to 21,432.60, 32,154 and 8,945.70 is: 13,420.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,432.60 : 32,154 = 8,945.70 : x
  2. Step 2: Convert to fraction form
    21,432.60/32,154 = 8,945.70/x
  3. Step 3: Cross multiply
    21,432.60x = 32,154 × 8,945.70
  4. Step 4: Simplify right side
    21,432.60x = 287,640,037.80
  5. Step 5: Solve for x
    x = 287,640,037.80/21,432.60
  6. Step 6: Final answer
    x = 13,420.68

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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.