Home / 20,689.63-28,551.82-11,258.26

Finding the Fourth Proportional to 20,689.63, 28,551.82 and 11,258.26

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Solution

The fourth proportional to 20,689.63, 28,551.82 and 11,258.26 is: 15,536.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,689.63 : 28,551.82 = 11,258.26 : x
  2. Step 2: Convert to fraction form
    20,689.63/28,551.82 = 11,258.26/x
  3. Step 3: Cross multiply
    20,689.63x = 28,551.82 × 11,258.26
  4. Step 4: Simplify right side
    20,689.63x = 321,443,670.27
  5. Step 5: Solve for x
    x = 321,443,670.27/20,689.63
  6. Step 6: Final answer
    x = 15,536.47

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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.