Home / 8,318.36-12,479.40-3,124.28

Finding the Fourth Proportional to 8,318.36, 12,479.40 and 3,124.28

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Solution

The fourth proportional to 8,318.36, 12,479.40 and 3,124.28 is: 4,687.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,318.36 : 12,479.40 = 3,124.28 : x
  2. Step 2: Convert to fraction form
    8,318.36/12,479.40 = 3,124.28/x
  3. Step 3: Cross multiply
    8,318.36x = 12,479.40 × 3,124.28
  4. Step 4: Simplify right side
    8,318.36x = 38,989,139.83
  5. Step 5: Solve for x
    x = 38,989,139.83/8,318.36
  6. Step 6: Final answer
    x = 4,687.12

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1.5x scale

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.