Home / 13,631.78-18,812.16-8,329.52

Finding the Fourth Proportional to 13,631.78, 18,812.16 and 8,329.52

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Solution

The fourth proportional to 13,631.78, 18,812.16 and 8,329.52 is: 11,494.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,631.78 : 18,812.16 = 8,329.52 : x
  2. Step 2: Convert to fraction form
    13,631.78/18,812.16 = 8,329.52/x
  3. Step 3: Cross multiply
    13,631.78x = 18,812.16 × 8,329.52
  4. Step 4: Simplify right side
    13,631.78x = 156,696,262.96
  5. Step 5: Solve for x
    x = 156,696,262.96/13,631.78
  6. Step 6: Final answer
    x = 11,494.92

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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.