Home / 10,480.20-15,720.30-3,904.60

Finding the Fourth Proportional to 10,480.20, 15,720.30 and 3,904.60

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Solution

The fourth proportional to 10,480.20, 15,720.30 and 3,904.60 is: 5,856.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,480.20 : 15,720.30 = 3,904.60 : x
  2. Step 2: Convert to fraction form
    10,480.20/15,720.30 = 3,904.60/x
  3. Step 3: Cross multiply
    10,480.20x = 15,720.30 × 3,904.60
  4. Step 4: Simplify right side
    10,480.20x = 61,381,483.38
  5. Step 5: Solve for x
    x = 61,381,483.38/10,480.20
  6. Step 6: Final answer
    x = 5,856.90

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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.