Home / 11,383.81-15,711.66-8,690.61

Finding the Fourth Proportional to 11,383.81, 15,711.66 and 8,690.61

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Solution

The fourth proportional to 11,383.81, 15,711.66 and 8,690.61 is: 11,994.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,383.81 : 15,711.66 = 8,690.61 : x
  2. Step 2: Convert to fraction form
    11,383.81/15,711.66 = 8,690.61/x
  3. Step 3: Cross multiply
    11,383.81x = 15,711.66 × 8,690.61
  4. Step 4: Simplify right side
    11,383.81x = 136,543,909.51
  5. Step 5: Solve for x
    x = 136,543,909.51/11,383.81
  6. Step 6: Final answer
    x = 11,994.57

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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.