Home / 20,402.23-28,155.59-11,450.45

Finding the Fourth Proportional to 20,402.23, 28,155.59 and 11,450.45

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Solution

The fourth proportional to 20,402.23, 28,155.59 and 11,450.45 is: 15,801.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,402.23 : 28,155.59 = 11,450.45 : x
  2. Step 2: Convert to fraction form
    20,402.23/28,155.59 = 11,450.45/x
  3. Step 3: Cross multiply
    20,402.23x = 28,155.59 × 11,450.45
  4. Step 4: Simplify right side
    20,402.23x = 322,394,204.14
  5. Step 5: Solve for x
    x = 322,394,204.14/20,402.23
  6. Step 6: Final answer
    x = 15,801.91

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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.