Home / 20,358.82-28,100.03-11,980.18

Finding the Fourth Proportional to 20,358.82, 28,100.03 and 11,980.18

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Solution

The fourth proportional to 20,358.82, 28,100.03 and 11,980.18 is: 16,535.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,358.82 : 28,100.03 = 11,980.18 : x
  2. Step 2: Convert to fraction form
    20,358.82/28,100.03 = 11,980.18/x
  3. Step 3: Cross multiply
    20,358.82x = 28,100.03 × 11,980.18
  4. Step 4: Simplify right side
    20,358.82x = 336,643,417.41
  5. Step 5: Solve for x
    x = 336,643,417.41/20,358.82
  6. Step 6: Final answer
    x = 16,535.51

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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.