Home / 10,390.08-15,589.12-3,819.20

Finding the Fourth Proportional to 10,390.08, 15,589.12 and 3,819.20

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Solution

The fourth proportional to 10,390.08, 15,589.12 and 3,819.20 is: 5,730.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,390.08 : 15,589.12 = 3,819.20 : x
  2. Step 2: Convert to fraction form
    10,390.08/15,589.12 = 3,819.20/x
  3. Step 3: Cross multiply
    10,390.08x = 15,589.12 × 3,819.20
  4. Step 4: Simplify right side
    10,390.08x = 59,537,967.10
  5. Step 5: Solve for x
    x = 59,537,967.10/10,390.08
  6. Step 6: Final answer
    x = 5,730.27

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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.