Home / 13,217.68-18,234.11-7,911.47

Finding the Fourth Proportional to 13,217.68, 18,234.11 and 7,911.47

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Solution

The fourth proportional to 13,217.68, 18,234.11 and 7,911.47 is: 10,914.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,217.68 : 18,234.11 = 7,911.47 : x
  2. Step 2: Convert to fraction form
    13,217.68/18,234.11 = 7,911.47/x
  3. Step 3: Cross multiply
    13,217.68x = 18,234.11 × 7,911.47
  4. Step 4: Simplify right side
    13,217.68x = 144,258,679.61
  5. Step 5: Solve for x
    x = 144,258,679.61/13,217.68
  6. Step 6: Final answer
    x = 10,914.07

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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.