Home / 7,124.20-9,831.68-3,979.76

Finding the Fourth Proportional to 7,124.20, 9,831.68 and 3,979.76

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Solution

The fourth proportional to 7,124.20, 9,831.68 and 3,979.76 is: 5,492.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,124.20 : 9,831.68 = 3,979.76 : x
  2. Step 2: Convert to fraction form
    7,124.20/9,831.68 = 3,979.76/x
  3. Step 3: Cross multiply
    7,124.20x = 9,831.68 × 3,979.76
  4. Step 4: Simplify right side
    7,124.20x = 39,127,726.80
  5. Step 5: Solve for x
    x = 39,127,726.80/7,124.20
  6. Step 6: Final answer
    x = 5,492.23

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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.