Home / 13,280.38-19,920.58-5,489.40

Finding the Fourth Proportional to 13,280.38, 19,920.58 and 5,489.40

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Solution

The fourth proportional to 13,280.38, 19,920.58 and 5,489.40 is: 8,234.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,280.38 : 19,920.58 = 5,489.40 : x
  2. Step 2: Convert to fraction form
    13,280.38/19,920.58 = 5,489.40/x
  3. Step 3: Cross multiply
    13,280.38x = 19,920.58 × 5,489.40
  4. Step 4: Simplify right side
    13,280.38x = 109,352,031.85
  5. Step 5: Solve for x
    x = 109,352,031.85/13,280.38
  6. Step 6: Final answer
    x = 8,234.10

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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.