Home / 18,109.47-27,139.15-13,071.68

Finding the Fourth Proportional to 18,109.47, 27,139.15 and 13,071.68

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Solution

The fourth proportional to 18,109.47, 27,139.15 and 13,071.68 is: 19,589.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,109.47 : 27,139.15 = 13,071.68 : x
  2. Step 2: Convert to fraction form
    18,109.47/27,139.15 = 13,071.68/x
  3. Step 3: Cross multiply
    18,109.47x = 27,139.15 × 13,071.68
  4. Step 4: Simplify right side
    18,109.47x = 354,754,266.69
  5. Step 5: Solve for x
    x = 354,754,266.69/18,109.47
  6. Step 6: Final answer
    x = 19,589.43

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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.