Home / 28,101.42-38,778.82-15,355.04

Finding the Fourth Proportional to 28,101.42, 38,778.82 and 15,355.04

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Solution

The fourth proportional to 28,101.42, 38,778.82 and 15,355.04 is: 21,189.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,101.42 : 38,778.82 = 15,355.04 : x
  2. Step 2: Convert to fraction form
    28,101.42/38,778.82 = 15,355.04/x
  3. Step 3: Cross multiply
    28,101.42x = 38,778.82 × 15,355.04
  4. Step 4: Simplify right side
    28,101.42x = 595,450,332.25
  5. Step 5: Solve for x
    x = 595,450,332.25/28,101.42
  6. Step 6: Final answer
    x = 21,189.33

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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.