Home / 8,639.20-12,959.88-3,641.32

Finding the Fourth Proportional to 8,639.20, 12,959.88 and 3,641.32

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Solution

The fourth proportional to 8,639.20, 12,959.88 and 3,641.32 is: 5,462.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,639.20 : 12,959.88 = 3,641.32 : x
  2. Step 2: Convert to fraction form
    8,639.20/12,959.88 = 3,641.32/x
  3. Step 3: Cross multiply
    8,639.20x = 12,959.88 × 3,641.32
  4. Step 4: Simplify right side
    8,639.20x = 47,191,070.24
  5. Step 5: Solve for x
    x = 47,191,070.24/8,639.20
  6. Step 6: Final answer
    x = 5,462.44

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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.