Home / 10,961.78-15,123.56-6,242.72

Finding the Fourth Proportional to 10,961.78, 15,123.56 and 6,242.72

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Solution

The fourth proportional to 10,961.78, 15,123.56 and 6,242.72 is: 8,612.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,961.78 : 15,123.56 = 6,242.72 : x
  2. Step 2: Convert to fraction form
    10,961.78/15,123.56 = 6,242.72/x
  3. Step 3: Cross multiply
    10,961.78x = 15,123.56 × 6,242.72
  4. Step 4: Simplify right side
    10,961.78x = 94,412,180.49
  5. Step 5: Solve for x
    x = 94,412,180.49/10,961.78
  6. Step 6: Final answer
    x = 8,612.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.