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Finding the Fourth Proportional to 10,000.78, 13,799.90 and 5,524.32

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Solution

The fourth proportional to 10,000.78, 13,799.90 and 5,524.32 is: 7,622.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,000.78 : 13,799.90 = 5,524.32 : x
  2. Step 2: Convert to fraction form
    10,000.78/13,799.90 = 5,524.32/x
  3. Step 3: Cross multiply
    10,000.78x = 13,799.90 × 5,524.32
  4. Step 4: Simplify right side
    10,000.78x = 76,235,063.57
  5. Step 5: Solve for x
    x = 76,235,063.57/10,000.78
  6. Step 6: Final answer
    x = 7,622.91

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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.