Home / 18,871.23-28,310.85-6,390.66

Finding the Fourth Proportional to 18,871.23, 28,310.85 and 6,390.66

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Solution

The fourth proportional to 18,871.23, 28,310.85 and 6,390.66 is: 9,587.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,871.23 : 28,310.85 = 6,390.66 : x
  2. Step 2: Convert to fraction form
    18,871.23/28,310.85 = 6,390.66/x
  3. Step 3: Cross multiply
    18,871.23x = 28,310.85 × 6,390.66
  4. Step 4: Simplify right side
    18,871.23x = 180,925,016.66
  5. Step 5: Solve for x
    x = 180,925,016.66/18,871.23
  6. Step 6: Final answer
    x = 9,587.35

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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.