Home / 20,689.80-28,552.14-11,258.34

Finding the Fourth Proportional to 20,689.80, 28,552.14 and 11,258.34

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Solution

The fourth proportional to 20,689.80, 28,552.14 and 11,258.34 is: 15,536.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,689.80 : 28,552.14 = 11,258.34 : x
  2. Step 2: Convert to fraction form
    20,689.80/28,552.14 = 11,258.34/x
  3. Step 3: Cross multiply
    20,689.80x = 28,552.14 × 11,258.34
  4. Step 4: Simplify right side
    20,689.80x = 321,449,699.85
  5. Step 5: Solve for x
    x = 321,449,699.85/20,689.80
  6. Step 6: Final answer
    x = 15,536.63

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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.