Home / 8,439.28-11,643.20-5,079.44

Finding the Fourth Proportional to 8,439.28, 11,643.20 and 5,079.44

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Solution

The fourth proportional to 8,439.28, 11,643.20 and 5,079.44 is: 7,007.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,439.28 : 11,643.20 = 5,079.44 : x
  2. Step 2: Convert to fraction form
    8,439.28/11,643.20 = 5,079.44/x
  3. Step 3: Cross multiply
    8,439.28x = 11,643.20 × 5,079.44
  4. Step 4: Simplify right side
    8,439.28x = 59,140,935.81
  5. Step 5: Solve for x
    x = 59,140,935.81/8,439.28
  6. Step 6: Final answer
    x = 7,007.82

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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.