Home / 13,428.09-18,538.48-8,966.61

Finding the Fourth Proportional to 13,428.09, 18,538.48 and 8,966.61

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Solution

The fourth proportional to 13,428.09, 18,538.48 and 8,966.61 is: 12,379.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,428.09 : 18,538.48 = 8,966.61 : x
  2. Step 2: Convert to fraction form
    13,428.09/18,538.48 = 8,966.61/x
  3. Step 3: Cross multiply
    13,428.09x = 18,538.48 × 8,966.61
  4. Step 4: Simplify right side
    13,428.09x = 166,227,227.46
  5. Step 5: Solve for x
    x = 166,227,227.46/13,428.09
  6. Step 6: Final answer
    x = 12,379.07

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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.