Home / 20,690.18-28,552.26-11,258.75

Finding the Fourth Proportional to 20,690.18, 28,552.26 and 11,258.75

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Solution

The fourth proportional to 20,690.18, 28,552.26 and 11,258.75 is: 15,536.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,690.18 : 28,552.26 = 11,258.75 : x
  2. Step 2: Convert to fraction form
    20,690.18/28,552.26 = 11,258.75/x
  3. Step 3: Cross multiply
    20,690.18x = 28,552.26 × 11,258.75
  4. Step 4: Simplify right side
    20,690.18x = 321,462,614.51
  5. Step 5: Solve for x
    x = 321,462,614.51/20,690.18
  6. Step 6: Final answer
    x = 15,536.97

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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.