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Finding the Fourth Proportional to 8,390.58, 11,583.45 and 5,247.78

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Solution

The fourth proportional to 8,390.58, 11,583.45 and 5,247.78 is: 7,244.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,390.58 : 11,583.45 = 5,247.78 : x
  2. Step 2: Convert to fraction form
    8,390.58/11,583.45 = 5,247.78/x
  3. Step 3: Cross multiply
    8,390.58x = 11,583.45 × 5,247.78
  4. Step 4: Simplify right side
    8,390.58x = 60,787,397.24
  5. Step 5: Solve for x
    x = 60,787,397.24/8,390.58
  6. Step 6: Final answer
    x = 7,244.72

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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.