Home / 21,423.76-32,141.31-8,939.64

Finding the Fourth Proportional to 21,423.76, 32,141.31 and 8,939.64

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Solution

The fourth proportional to 21,423.76, 32,141.31 and 8,939.64 is: 13,411.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,423.76 : 32,141.31 = 8,939.64 : x
  2. Step 2: Convert to fraction form
    21,423.76/32,141.31 = 8,939.64/x
  3. Step 3: Cross multiply
    21,423.76x = 32,141.31 × 8,939.64
  4. Step 4: Simplify right side
    21,423.76x = 287,331,740.53
  5. Step 5: Solve for x
    x = 287,331,740.53/21,423.76
  6. Step 6: Final answer
    x = 13,411.83

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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.