Home / 20,557.54-28,369.40-11,126.10

Finding the Fourth Proportional to 20,557.54, 28,369.40 and 11,126.10

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Solution

The fourth proportional to 20,557.54, 28,369.40 and 11,126.10 is: 15,354.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,557.54 : 28,369.40 = 11,126.10 : x
  2. Step 2: Convert to fraction form
    20,557.54/28,369.40 = 11,126.10/x
  3. Step 3: Cross multiply
    20,557.54x = 28,369.40 × 11,126.10
  4. Step 4: Simplify right side
    20,557.54x = 315,640,843.44
  5. Step 5: Solve for x
    x = 315,640,843.44/20,557.54
  6. Step 6: Final answer
    x = 15,354.02

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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.