Home / 13,639.52-20,443.92-6,718.88

Finding the Fourth Proportional to 13,639.52, 20,443.92 and 6,718.88

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Solution

The fourth proportional to 13,639.52, 20,443.92 and 6,718.88 is: 10,070.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,639.52 : 20,443.92 = 6,718.88 : x
  2. Step 2: Convert to fraction form
    13,639.52/20,443.92 = 6,718.88/x
  3. Step 3: Cross multiply
    13,639.52x = 20,443.92 × 6,718.88
  4. Step 4: Simplify right side
    13,639.52x = 137,360,245.21
  5. Step 5: Solve for x
    x = 137,360,245.21/13,639.52
  6. Step 6: Final answer
    x = 10,070.75

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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.