Home / 18,961.29-28,445.58-5,811.35

Finding the Fourth Proportional to 18,961.29, 28,445.58 and 5,811.35

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Solution

The fourth proportional to 18,961.29, 28,445.58 and 5,811.35 is: 8,718.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,961.29 : 28,445.58 = 5,811.35 : x
  2. Step 2: Convert to fraction form
    18,961.29/28,445.58 = 5,811.35/x
  3. Step 3: Cross multiply
    18,961.29x = 28,445.58 × 5,811.35
  4. Step 4: Simplify right side
    18,961.29x = 165,307,079.11
  5. Step 5: Solve for x
    x = 165,307,079.11/18,961.29
  6. Step 6: Final answer
    x = 8,718.13

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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.