Home / 10,421.20-15,631.80-3,025.90

Finding the Fourth Proportional to 10,421.20, 15,631.80 and 3,025.90

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Solution

The fourth proportional to 10,421.20, 15,631.80 and 3,025.90 is: 4,538.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,421.20 : 15,631.80 = 3,025.90 : x
  2. Step 2: Convert to fraction form
    10,421.20/15,631.80 = 3,025.90/x
  3. Step 3: Cross multiply
    10,421.20x = 15,631.80 × 3,025.90
  4. Step 4: Simplify right side
    10,421.20x = 47,300,263.62
  5. Step 5: Solve for x
    x = 47,300,263.62/10,421.20
  6. Step 6: Final answer
    x = 4,538.85

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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.