Home / 11,518.80-15,881.28-8,833.12

Finding the Fourth Proportional to 11,518.80, 15,881.28 and 8,833.12

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Solution

The fourth proportional to 11,518.80, 15,881.28 and 8,833.12 is: 12,178.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,518.80 : 15,881.28 = 8,833.12 : x
  2. Step 2: Convert to fraction form
    11,518.80/15,881.28 = 8,833.12/x
  3. Step 3: Cross multiply
    11,518.80x = 15,881.28 × 8,833.12
  4. Step 4: Simplify right side
    11,518.80x = 140,281,251.99
  5. Step 5: Solve for x
    x = 140,281,251.99/11,518.80
  6. Step 6: Final answer
    x = 12,178.46

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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.