Home / 5,612.81-8,419.34-2,687.90

Finding the Fourth Proportional to 5,612.81, 8,419.34 and 2,687.90

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Solution

The fourth proportional to 5,612.81, 8,419.34 and 2,687.90 is: 4,031.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,612.81 : 8,419.34 = 2,687.90 : x
  2. Step 2: Convert to fraction form
    5,612.81/8,419.34 = 2,687.90/x
  3. Step 3: Cross multiply
    5,612.81x = 8,419.34 × 2,687.90
  4. Step 4: Simplify right side
    5,612.81x = 22,630,343.99
  5. Step 5: Solve for x
    x = 22,630,343.99/5,612.81
  6. Step 6: Final answer
    x = 4,031.91

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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.