Home / 8,398.28-12,588.63-3,131.00

Finding the Fourth Proportional to 8,398.28, 12,588.63 and 3,131.00

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Solution

The fourth proportional to 8,398.28, 12,588.63 and 3,131.00 is: 4,693.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,398.28 : 12,588.63 = 3,131.00 : x
  2. Step 2: Convert to fraction form
    8,398.28/12,588.63 = 3,131.00/x
  3. Step 3: Cross multiply
    8,398.28x = 12,588.63 × 3,131.00
  4. Step 4: Simplify right side
    8,398.28x = 39,414,988.42
  5. Step 5: Solve for x
    x = 39,414,988.42/8,398.28
  6. Step 6: Final answer
    x = 4,693.22

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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.