Home / 9,153.20-12,621.92-7,831.28

Finding the Fourth Proportional to 9,153.20, 12,621.92 and 7,831.28

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Solution

The fourth proportional to 9,153.20, 12,621.92 and 7,831.28 is: 10,799.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,153.20 : 12,621.92 = 7,831.28 : x
  2. Step 2: Convert to fraction form
    9,153.20/12,621.92 = 7,831.28/x
  3. Step 3: Cross multiply
    9,153.20x = 12,621.92 × 7,831.28
  4. Step 4: Simplify right side
    9,153.20x = 98,845,789.66
  5. Step 5: Solve for x
    x = 98,845,789.66/9,153.20
  6. Step 6: Final answer
    x = 10,799.04

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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.