Home / 21,920.18-32,904.84-8,781.71

Finding the Fourth Proportional to 21,920.18, 32,904.84 and 8,781.71

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Solution

The fourth proportional to 21,920.18, 32,904.84 and 8,781.71 is: 13,182.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,920.18 : 32,904.84 = 8,781.71 : x
  2. Step 2: Convert to fraction form
    21,920.18/32,904.84 = 8,781.71/x
  3. Step 3: Cross multiply
    21,920.18x = 32,904.84 × 8,781.71
  4. Step 4: Simplify right side
    21,920.18x = 288,960,762.48
  5. Step 5: Solve for x
    x = 288,960,762.48/21,920.18
  6. Step 6: Final answer
    x = 13,182.41

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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.