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Finding the Fourth Proportional to 5,886.60, 8,128.78 and 4,391.92

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Solution

The fourth proportional to 5,886.60, 8,128.78 and 4,391.92 is: 6,064.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,886.60 : 8,128.78 = 4,391.92 : x
  2. Step 2: Convert to fraction form
    5,886.60/8,128.78 = 4,391.92/x
  3. Step 3: Cross multiply
    5,886.60x = 8,128.78 × 4,391.92
  4. Step 4: Simplify right side
    5,886.60x = 35,700,951.46
  5. Step 5: Solve for x
    x = 35,700,951.46/5,886.60
  6. Step 6: Final answer
    x = 6,064.78

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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.