Home / 8,318.40-12,479.36-3,124.32

Finding the Fourth Proportional to 8,318.40, 12,479.36 and 3,124.32

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Solution

The fourth proportional to 8,318.40, 12,479.36 and 3,124.32 is: 4,687.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,318.40 : 12,479.36 = 3,124.32 : x
  2. Step 2: Convert to fraction form
    8,318.40/12,479.36 = 3,124.32/x
  3. Step 3: Cross multiply
    8,318.40x = 12,479.36 × 3,124.32
  4. Step 4: Simplify right side
    8,318.40x = 38,989,514.04
  5. Step 5: Solve for x
    x = 38,989,514.04/8,318.40
  6. Step 6: Final answer
    x = 4,687.14

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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.