Home / 10,961.49-15,123.38-6,486.78

Finding the Fourth Proportional to 10,961.49, 15,123.38 and 6,486.78

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Solution

The fourth proportional to 10,961.49, 15,123.38 and 6,486.78 is: 8,949.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,961.49 : 15,123.38 = 6,486.78 : x
  2. Step 2: Convert to fraction form
    10,961.49/15,123.38 = 6,486.78/x
  3. Step 3: Cross multiply
    10,961.49x = 15,123.38 × 6,486.78
  4. Step 4: Simplify right side
    10,961.49x = 98,102,006.48
  5. Step 5: Solve for x
    x = 98,102,006.48/10,961.49
  6. Step 6: Final answer
    x = 8,949.70

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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.