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Finding the Fourth Proportional to 21,860.70, 32,781.99 and 6,862.80

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Solution

The fourth proportional to 21,860.70, 32,781.99 and 6,862.80 is: 10,291.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,860.70 : 32,781.99 = 6,862.80 : x
  2. Step 2: Convert to fraction form
    21,860.70/32,781.99 = 6,862.80/x
  3. Step 3: Cross multiply
    21,860.70x = 32,781.99 × 6,862.80
  4. Step 4: Simplify right side
    21,860.70x = 224,976,240.97
  5. Step 5: Solve for x
    x = 224,976,240.97/21,860.70
  6. Step 6: Final answer
    x = 10,291.36

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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.