Home / 20,135.07-27,771-13,679.70

Finding the Fourth Proportional to 20,135.07, 27,771 and 13,679.70

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Solution

The fourth proportional to 20,135.07, 27,771 and 13,679.70 is: 18,867.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,135.07 : 27,771 = 13,679.70 : x
  2. Step 2: Convert to fraction form
    20,135.07/27,771 = 13,679.70/x
  3. Step 3: Cross multiply
    20,135.07x = 27,771 × 13,679.70
  4. Step 4: Simplify right side
    20,135.07x = 379,898,948.70
  5. Step 5: Solve for x
    x = 379,898,948.70/20,135.07
  6. Step 6: Final answer
    x = 18,867.53

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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.