Home / 5,612.45-8,407.90-3,139.78

Finding the Fourth Proportional to 5,612.45, 8,407.90 and 3,139.78

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Solution

The fourth proportional to 5,612.45, 8,407.90 and 3,139.78 is: 4,703.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,612.45 : 8,407.90 = 3,139.78 : x
  2. Step 2: Convert to fraction form
    5,612.45/8,407.90 = 3,139.78/x
  3. Step 3: Cross multiply
    5,612.45x = 8,407.90 × 3,139.78
  4. Step 4: Simplify right side
    5,612.45x = 26,398,927.39
  5. Step 5: Solve for x
    x = 26,398,927.39/5,612.45
  6. Step 6: Final answer
    x = 4,703.63

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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.