Home / 7,117.28-9,822.43-3,930.87

Finding the Fourth Proportional to 7,117.28, 9,822.43 and 3,930.87

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Solution

The fourth proportional to 7,117.28, 9,822.43 and 3,930.87 is: 5,424.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,117.28 : 9,822.43 = 3,930.87 : x
  2. Step 2: Convert to fraction form
    7,117.28/9,822.43 = 3,930.87/x
  3. Step 3: Cross multiply
    7,117.28x = 9,822.43 × 3,930.87
  4. Step 4: Simplify right side
    7,117.28x = 38,610,695.41
  5. Step 5: Solve for x
    x = 38,610,695.41/7,117.28
  6. Step 6: Final answer
    x = 5,424.92

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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.