Home / 13,947.72-20,925.12-6,456.68

Finding the Fourth Proportional to 13,947.72, 20,925.12 and 6,456.68

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Solution

The fourth proportional to 13,947.72, 20,925.12 and 6,456.68 is: 9,686.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,947.72 : 20,925.12 = 6,456.68 : x
  2. Step 2: Convert to fraction form
    13,947.72/20,925.12 = 6,456.68/x
  3. Step 3: Cross multiply
    13,947.72x = 20,925.12 × 6,456.68
  4. Step 4: Simplify right side
    13,947.72x = 135,106,735.35
  5. Step 5: Solve for x
    x = 135,106,735.35/13,947.72
  6. Step 6: Final answer
    x = 9,686.66

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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.