Home / 13,581.61-20,329.79-9,340.11

Finding the Fourth Proportional to 13,581.61, 20,329.79 and 9,340.11

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Solution

The fourth proportional to 13,581.61, 20,329.79 and 9,340.11 is: 13,980.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,581.61 : 20,329.79 = 9,340.11 : x
  2. Step 2: Convert to fraction form
    13,581.61/20,329.79 = 9,340.11/x
  3. Step 3: Cross multiply
    13,581.61x = 20,329.79 × 9,340.11
  4. Step 4: Simplify right side
    13,581.61x = 189,882,474.88
  5. Step 5: Solve for x
    x = 189,882,474.88/13,581.61
  6. Step 6: Final answer
    x = 13,980.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.