Home / 8,403.10-12,604.65-3,138.52

Finding the Fourth Proportional to 8,403.10, 12,604.65 and 3,138.52

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Solution

The fourth proportional to 8,403.10, 12,604.65 and 3,138.52 is: 4,707.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,403.10 : 12,604.65 = 3,138.52 : x
  2. Step 2: Convert to fraction form
    8,403.10/12,604.65 = 3,138.52/x
  3. Step 3: Cross multiply
    8,403.10x = 12,604.65 × 3,138.52
  4. Step 4: Simplify right side
    8,403.10x = 39,559,926.47
  5. Step 5: Solve for x
    x = 39,559,926.47/8,403.10
  6. Step 6: Final answer
    x = 4,707.78

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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.