Home / 11,159.68-15,419.96-8,788.50

Finding the Fourth Proportional to 11,159.68, 15,419.96 and 8,788.50

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Solution

The fourth proportional to 11,159.68, 15,419.96 and 8,788.50 is: 12,143.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,159.68 : 15,419.96 = 8,788.50 : x
  2. Step 2: Convert to fraction form
    11,159.68/15,419.96 = 8,788.50/x
  3. Step 3: Cross multiply
    11,159.68x = 15,419.96 × 8,788.50
  4. Step 4: Simplify right side
    11,159.68x = 135,518,318.46
  5. Step 5: Solve for x
    x = 135,518,318.46/11,159.68
  6. Step 6: Final answer
    x = 12,143.57

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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.