Home / 20,559.75-28,372.47-11,128.32

Finding the Fourth Proportional to 20,559.75, 28,372.47 and 11,128.32

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Solution

The fourth proportional to 20,559.75, 28,372.47 and 11,128.32 is: 15,357.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,559.75 : 28,372.47 = 11,128.32 : x
  2. Step 2: Convert to fraction form
    20,559.75/28,372.47 = 11,128.32/x
  3. Step 3: Cross multiply
    20,559.75x = 28,372.47 × 11,128.32
  4. Step 4: Simplify right side
    20,559.75x = 315,737,925.35
  5. Step 5: Solve for x
    x = 315,737,925.35/20,559.75
  6. Step 6: Final answer
    x = 15,357.09

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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.