Home / 20,749.80-31,100.10-11,966.58

Finding the Fourth Proportional to 20,749.80, 31,100.10 and 11,966.58

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Solution

The fourth proportional to 20,749.80, 31,100.10 and 11,966.58 is: 17,935.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,749.80 : 31,100.10 = 11,966.58 : x
  2. Step 2: Convert to fraction form
    20,749.80/31,100.10 = 11,966.58/x
  3. Step 3: Cross multiply
    20,749.80x = 31,100.10 × 11,966.58
  4. Step 4: Simplify right side
    20,749.80x = 372,161,834.66
  5. Step 5: Solve for x
    x = 372,161,834.66/20,749.80
  6. Step 6: Final answer
    x = 17,935.68

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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.