Home / 25,519.18-38,278.77-7,990.38

Finding the Fourth Proportional to 25,519.18, 38,278.77 and 7,990.38

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Solution

The fourth proportional to 25,519.18, 38,278.77 and 7,990.38 is: 11,985.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,519.18 : 38,278.77 = 7,990.38 : x
  2. Step 2: Convert to fraction form
    25,519.18/38,278.77 = 7,990.38/x
  3. Step 3: Cross multiply
    25,519.18x = 38,278.77 × 7,990.38
  4. Step 4: Simplify right side
    25,519.18x = 305,861,918.23
  5. Step 5: Solve for x
    x = 305,861,918.23/25,519.18
  6. Step 6: Final answer
    x = 11,985.57

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Double scale
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Similar ratio
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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.