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Finding the Fourth Proportional to 18,959.72, 28,445.04 and 5,814.02

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Solution

The fourth proportional to 18,959.72, 28,445.04 and 5,814.02 is: 8,722.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,959.72 : 28,445.04 = 5,814.02 : x
  2. Step 2: Convert to fraction form
    18,959.72/28,445.04 = 5,814.02/x
  3. Step 3: Cross multiply
    18,959.72x = 28,445.04 × 5,814.02
  4. Step 4: Simplify right side
    18,959.72x = 165,380,031.46
  5. Step 5: Solve for x
    x = 165,380,031.46/18,959.72
  6. Step 6: Final answer
    x = 8,722.70

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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.