Home / 20,127.90-30,191.76-17,138.51

Finding the Fourth Proportional to 20,127.90, 30,191.76 and 17,138.51

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Solution

The fourth proportional to 20,127.90, 30,191.76 and 17,138.51 is: 25,707.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,127.90 : 30,191.76 = 17,138.51 : x
  2. Step 2: Convert to fraction form
    20,127.90/30,191.76 = 17,138.51/x
  3. Step 3: Cross multiply
    20,127.90x = 30,191.76 × 17,138.51
  4. Step 4: Simplify right side
    20,127.90x = 517,441,629.72
  5. Step 5: Solve for x
    x = 517,441,629.72/20,127.90
  6. Step 6: Final answer
    x = 25,707.68

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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.