Home / 20,815.92-28,717.26-13,647.56

Finding the Fourth Proportional to 20,815.92, 28,717.26 and 13,647.56

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Solution

The fourth proportional to 20,815.92, 28,717.26 and 13,647.56 is: 18,827.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,815.92 : 28,717.26 = 13,647.56 : x
  2. Step 2: Convert to fraction form
    20,815.92/28,717.26 = 13,647.56/x
  3. Step 3: Cross multiply
    20,815.92x = 28,717.26 × 13,647.56
  4. Step 4: Simplify right side
    20,815.92x = 391,920,528.89
  5. Step 5: Solve for x
    x = 391,920,528.89/20,815.92
  6. Step 6: Final answer
    x = 18,827.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.