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Finding the Fourth Proportional to 15,000.59, 20,700.74 and 8,286.68

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Solution

The fourth proportional to 15,000.59, 20,700.74 and 8,286.68 is: 11,435.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,000.59 : 20,700.74 = 8,286.68 : x
  2. Step 2: Convert to fraction form
    15,000.59/20,700.74 = 8,286.68/x
  3. Step 3: Cross multiply
    15,000.59x = 20,700.74 × 8,286.68
  4. Step 4: Simplify right side
    15,000.59x = 171,540,366.71
  5. Step 5: Solve for x
    x = 171,540,366.71/15,000.59
  6. Step 6: Final answer
    x = 11,435.57

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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.