Home / 21,939.68-32,904.08-8,615.40

Finding the Fourth Proportional to 21,939.68, 32,904.08 and 8,615.40

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Solution

The fourth proportional to 21,939.68, 32,904.08 and 8,615.40 is: 12,920.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,939.68 : 32,904.08 = 8,615.40 : x
  2. Step 2: Convert to fraction form
    21,939.68/32,904.08 = 8,615.40/x
  3. Step 3: Cross multiply
    21,939.68x = 32,904.08 × 8,615.40
  4. Step 4: Simplify right side
    21,939.68x = 283,481,810.83
  5. Step 5: Solve for x
    x = 283,481,810.83/21,939.68
  6. Step 6: Final answer
    x = 12,920.96

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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.