Home / 20,512.72-28,301.70-11,557.10

Finding the Fourth Proportional to 20,512.72, 28,301.70 and 11,557.10

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Solution

The fourth proportional to 20,512.72, 28,301.70 and 11,557.10 is: 15,945.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,512.72 : 28,301.70 = 11,557.10 : x
  2. Step 2: Convert to fraction form
    20,512.72/28,301.70 = 11,557.10/x
  3. Step 3: Cross multiply
    20,512.72x = 28,301.70 × 11,557.10
  4. Step 4: Simplify right side
    20,512.72x = 327,085,577.07
  5. Step 5: Solve for x
    x = 327,085,577.07/20,512.72
  6. Step 6: Final answer
    x = 15,945.50

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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.