Home / 9,405.52-12,979.12-5,155.76

Finding the Fourth Proportional to 9,405.52, 12,979.12 and 5,155.76

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Solution

The fourth proportional to 9,405.52, 12,979.12 and 5,155.76 is: 7,114.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,405.52 : 12,979.12 = 5,155.76 : x
  2. Step 2: Convert to fraction form
    9,405.52/12,979.12 = 5,155.76/x
  3. Step 3: Cross multiply
    9,405.52x = 12,979.12 × 5,155.76
  4. Step 4: Simplify right side
    9,405.52x = 66,917,227.73
  5. Step 5: Solve for x
    x = 66,917,227.73/9,405.52
  6. Step 6: Final answer
    x = 7,114.68

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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.