Home / 20,689.36-28,551.96-11,258.56

Finding the Fourth Proportional to 20,689.36, 28,551.96 and 11,258.56

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Solution

The fourth proportional to 20,689.36, 28,551.96 and 11,258.56 is: 15,537.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,689.36 : 28,551.96 = 11,258.56 : x
  2. Step 2: Convert to fraction form
    20,689.36/28,551.96 = 11,258.56/x
  3. Step 3: Cross multiply
    20,689.36x = 28,551.96 × 11,258.56
  4. Step 4: Simplify right side
    20,689.36x = 321,453,954.78
  5. Step 5: Solve for x
    x = 321,453,954.78/20,689.36
  6. Step 6: Final answer
    x = 15,537.16

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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.