Home / 21,990.60-32,948.10-10,279.80

Finding the Fourth Proportional to 21,990.60, 32,948.10 and 10,279.80

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Solution

The fourth proportional to 21,990.60, 32,948.10 and 10,279.80 is: 15,402.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,990.60 : 32,948.10 = 10,279.80 : x
  2. Step 2: Convert to fraction form
    21,990.60/32,948.10 = 10,279.80/x
  3. Step 3: Cross multiply
    21,990.60x = 32,948.10 × 10,279.80
  4. Step 4: Simplify right side
    21,990.60x = 338,699,878.38
  5. Step 5: Solve for x
    x = 338,699,878.38/21,990.60
  6. Step 6: Final answer
    x = 15,402.03

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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.