Home / 20,689.56-28,551.60-11,258.10

Finding the Fourth Proportional to 20,689.56, 28,551.60 and 11,258.10

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Solution

The fourth proportional to 20,689.56, 28,551.60 and 11,258.10 is: 15,536.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,689.56 : 28,551.60 = 11,258.10 : x
  2. Step 2: Convert to fraction form
    20,689.56/28,551.60 = 11,258.10/x
  3. Step 3: Cross multiply
    20,689.56x = 28,551.60 × 11,258.10
  4. Step 4: Simplify right side
    20,689.56x = 321,436,767.96
  5. Step 5: Solve for x
    x = 321,436,767.96/20,689.56
  6. Step 6: Final answer
    x = 15,536.18

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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.