Home / 20,386.97-28,134.03-11,889.47

Finding the Fourth Proportional to 20,386.97, 28,134.03 and 11,889.47

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Solution

The fourth proportional to 20,386.97, 28,134.03 and 11,889.47 is: 16,407.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,386.97 : 28,134.03 = 11,889.47 : x
  2. Step 2: Convert to fraction form
    20,386.97/28,134.03 = 11,889.47/x
  3. Step 3: Cross multiply
    20,386.97x = 28,134.03 × 11,889.47
  4. Step 4: Simplify right side
    20,386.97x = 334,498,705.66
  5. Step 5: Solve for x
    x = 334,498,705.66/20,386.97
  6. Step 6: Final answer
    x = 16,407.48

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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.