Home / 9,921.78-13,691.70-5,886.81

Finding the Fourth Proportional to 9,921.78, 13,691.70 and 5,886.81

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Solution

The fourth proportional to 9,921.78, 13,691.70 and 5,886.81 is: 8,123.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,921.78 : 13,691.70 = 5,886.81 : x
  2. Step 2: Convert to fraction form
    9,921.78/13,691.70 = 5,886.81/x
  3. Step 3: Cross multiply
    9,921.78x = 13,691.70 × 5,886.81
  4. Step 4: Simplify right side
    9,921.78x = 80,600,436.48
  5. Step 5: Solve for x
    x = 80,600,436.48/9,921.78
  6. Step 6: Final answer
    x = 8,123.59

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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.