Home / 10,621.28-15,932.08-2,831.20

Finding the Fourth Proportional to 10,621.28, 15,932.08 and 2,831.20

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Solution

The fourth proportional to 10,621.28, 15,932.08 and 2,831.20 is: 4,246.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,621.28 : 15,932.08 = 2,831.20 : x
  2. Step 2: Convert to fraction form
    10,621.28/15,932.08 = 2,831.20/x
  3. Step 3: Cross multiply
    10,621.28x = 15,932.08 × 2,831.20
  4. Step 4: Simplify right side
    10,621.28x = 45,106,904.90
  5. Step 5: Solve for x
    x = 45,106,904.90/10,621.28
  6. Step 6: Final answer
    x = 4,246.84

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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.