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Finding the Fourth Proportional to 15,000.84, 20,700.76 and 8,286.32

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Solution

The fourth proportional to 15,000.84, 20,700.76 and 8,286.32 is: 11,434.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,000.84 : 20,700.76 = 8,286.32 : x
  2. Step 2: Convert to fraction form
    15,000.84/20,700.76 = 8,286.32/x
  3. Step 3: Cross multiply
    15,000.84x = 20,700.76 × 8,286.32
  4. Step 4: Simplify right side
    15,000.84x = 171,533,121.60
  5. Step 5: Solve for x
    x = 171,533,121.60/15,000.84
  6. Step 6: Final answer
    x = 11,434.90

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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.