Home / 21,180.97-31,769.73-7,140.70

Finding the Fourth Proportional to 21,180.97, 31,769.73 and 7,140.70

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Solution

The fourth proportional to 21,180.97, 31,769.73 and 7,140.70 is: 10,710.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,180.97 : 31,769.73 = 7,140.70 : x
  2. Step 2: Convert to fraction form
    21,180.97/31,769.73 = 7,140.70/x
  3. Step 3: Cross multiply
    21,180.97x = 31,769.73 × 7,140.70
  4. Step 4: Simplify right side
    21,180.97x = 226,858,031.59
  5. Step 5: Solve for x
    x = 226,858,031.59/21,180.97
  6. Step 6: Final answer
    x = 10,710.46

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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.