Home / 21,227.60-31,820.40-9,387.80

Finding the Fourth Proportional to 21,227.60, 31,820.40 and 9,387.80

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Solution

The fourth proportional to 21,227.60, 31,820.40 and 9,387.80 is: 14,072.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,227.60 : 31,820.40 = 9,387.80 : x
  2. Step 2: Convert to fraction form
    21,227.60/31,820.40 = 9,387.80/x
  3. Step 3: Cross multiply
    21,227.60x = 31,820.40 × 9,387.80
  4. Step 4: Simplify right side
    21,227.60x = 298,723,551.12
  5. Step 5: Solve for x
    x = 298,723,551.12/21,227.60
  6. Step 6: Final answer
    x = 14,072.41

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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.