Home / 20,690.28-28,552.32-11,258.64

Finding the Fourth Proportional to 20,690.28, 28,552.32 and 11,258.64

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Solution

The fourth proportional to 20,690.28, 28,552.32 and 11,258.64 is: 15,536.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,690.28 : 28,552.32 = 11,258.64 : x
  2. Step 2: Convert to fraction form
    20,690.28/28,552.32 = 11,258.64/x
  3. Step 3: Cross multiply
    20,690.28x = 28,552.32 × 11,258.64
  4. Step 4: Simplify right side
    20,690.28x = 321,460,292.04
  5. Step 5: Solve for x
    x = 321,460,292.04/20,690.28
  6. Step 6: Final answer
    x = 15,536.78

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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.