Home / 5,445-8,154.51-3,131.64

Finding the Fourth Proportional to 5,445, 8,154.51 and 3,131.64

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Solution

The fourth proportional to 5,445, 8,154.51 and 3,131.64 is: 4,689.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,445 : 8,154.51 = 3,131.64 : x
  2. Step 2: Convert to fraction form
    5,445/8,154.51 = 3,131.64/x
  3. Step 3: Cross multiply
    5,445x = 8,154.51 × 3,131.64
  4. Step 4: Simplify right side
    5,445x = 25,536,989.70
  5. Step 5: Solve for x
    x = 25,536,989.70/5,445
  6. Step 6: Final answer
    x = 4,689.99

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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.