Home / 5,431.40-8,139.13-3,207.95

Finding the Fourth Proportional to 5,431.40, 8,139.13 and 3,207.95

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Solution

The fourth proportional to 5,431.40, 8,139.13 and 3,207.95 is: 4,807.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,431.40 : 8,139.13 = 3,207.95 : x
  2. Step 2: Convert to fraction form
    5,431.40/8,139.13 = 3,207.95/x
  3. Step 3: Cross multiply
    5,431.40x = 8,139.13 × 3,207.95
  4. Step 4: Simplify right side
    5,431.40x = 26,109,967.72
  5. Step 5: Solve for x
    x = 26,109,967.72/5,431.40
  6. Step 6: Final answer
    x = 4,807.22

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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.