Home / 12,128.39-16,731.65-8,765.88

Finding the Fourth Proportional to 12,128.39, 16,731.65 and 8,765.88

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Solution

The fourth proportional to 12,128.39, 16,731.65 and 8,765.88 is: 12,092.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,128.39 : 16,731.65 = 8,765.88 : x
  2. Step 2: Convert to fraction form
    12,128.39/16,731.65 = 8,765.88/x
  3. Step 3: Cross multiply
    12,128.39x = 16,731.65 × 8,765.88
  4. Step 4: Simplify right side
    12,128.39x = 146,667,572.36
  5. Step 5: Solve for x
    x = 146,667,572.36/12,128.39
  6. Step 6: Final answer
    x = 12,092.91

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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.