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Finding the Fourth Proportional to 11,886.40, 16,403.04 and 6,581.20

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Solution

The fourth proportional to 11,886.40, 16,403.04 and 6,581.20 is: 9,081.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,886.40 : 16,403.04 = 6,581.20 : x
  2. Step 2: Convert to fraction form
    11,886.40/16,403.04 = 6,581.20/x
  3. Step 3: Cross multiply
    11,886.40x = 16,403.04 × 6,581.20
  4. Step 4: Simplify right side
    11,886.40x = 107,951,686.85
  5. Step 5: Solve for x
    x = 107,951,686.85/11,886.40
  6. Step 6: Final answer
    x = 9,081.95

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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.