Home / 20,515.68-28,310.76-11,563.11

Finding the Fourth Proportional to 20,515.68, 28,310.76 and 11,563.11

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Solution

The fourth proportional to 20,515.68, 28,310.76 and 11,563.11 is: 15,956.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,515.68 : 28,310.76 = 11,563.11 : x
  2. Step 2: Convert to fraction form
    20,515.68/28,310.76 = 11,563.11/x
  3. Step 3: Cross multiply
    20,515.68x = 28,310.76 × 11,563.11
  4. Step 4: Simplify right side
    20,515.68x = 327,360,432.06
  5. Step 5: Solve for x
    x = 327,360,432.06/20,515.68
  6. Step 6: Final answer
    x = 15,956.60

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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.