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Finding the Fourth Proportional to 25,959.78, 38,939.76 and 7,491.78

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Solution

The fourth proportional to 25,959.78, 38,939.76 and 7,491.78 is: 11,237.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,959.78 : 38,939.76 = 7,491.78 : x
  2. Step 2: Convert to fraction form
    25,959.78/38,939.76 = 7,491.78/x
  3. Step 3: Cross multiply
    25,959.78x = 38,939.76 × 7,491.78
  4. Step 4: Simplify right side
    25,959.78x = 291,728,115.17
  5. Step 5: Solve for x
    x = 291,728,115.17/25,959.78
  6. Step 6: Final answer
    x = 11,237.70

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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.