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Finding the Fourth Proportional to 18,759.85, 28,143.55 and 6,913.69

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Solution

The fourth proportional to 18,759.85, 28,143.55 and 6,913.69 is: 10,371.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,759.85 : 28,143.55 = 6,913.69 : x
  2. Step 2: Convert to fraction form
    18,759.85/28,143.55 = 6,913.69/x
  3. Step 3: Cross multiply
    18,759.85x = 28,143.55 × 6,913.69
  4. Step 4: Simplify right side
    18,759.85x = 194,575,675.27
  5. Step 5: Solve for x
    x = 194,575,675.27/18,759.85
  6. Step 6: Final answer
    x = 10,371.92

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1.5x scale

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.