Home / 20,689.26-28,551.40-11,258.02

Finding the Fourth Proportional to 20,689.26, 28,551.40 and 11,258.02

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Solution

The fourth proportional to 20,689.26, 28,551.40 and 11,258.02 is: 15,536.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,689.26 : 28,551.40 = 11,258.02 : x
  2. Step 2: Convert to fraction form
    20,689.26/28,551.40 = 11,258.02/x
  3. Step 3: Cross multiply
    20,689.26x = 28,551.40 × 11,258.02
  4. Step 4: Simplify right side
    20,689.26x = 321,432,232.23
  5. Step 5: Solve for x
    x = 321,432,232.23/20,689.26
  6. Step 6: Final answer
    x = 15,536.19

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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.