Home / 13,720.91-20,585.30-5,819.36

Finding the Fourth Proportional to 13,720.91, 20,585.30 and 5,819.36

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Solution

The fourth proportional to 13,720.91, 20,585.30 and 5,819.36 is: 8,730.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,720.91 : 20,585.30 = 5,819.36 : x
  2. Step 2: Convert to fraction form
    13,720.91/20,585.30 = 5,819.36/x
  3. Step 3: Cross multiply
    13,720.91x = 20,585.30 × 5,819.36
  4. Step 4: Simplify right side
    13,720.91x = 119,793,139.38
  5. Step 5: Solve for x
    x = 119,793,139.38/13,720.91
  6. Step 6: Final answer
    x = 8,730.70

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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.