Home / 20,943.40-28,903.14-11,512.68

Finding the Fourth Proportional to 20,943.40, 28,903.14 and 11,512.68

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Solution

The fourth proportional to 20,943.40, 28,903.14 and 11,512.68 is: 15,888.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,943.40 : 28,903.14 = 11,512.68 : x
  2. Step 2: Convert to fraction form
    20,943.40/28,903.14 = 11,512.68/x
  3. Step 3: Cross multiply
    20,943.40x = 28,903.14 × 11,512.68
  4. Step 4: Simplify right side
    20,943.40x = 332,752,601.82
  5. Step 5: Solve for x
    x = 332,752,601.82/20,943.40
  6. Step 6: Final answer
    x = 15,888.18

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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.