Home / 28,383.38-39,170.28-15,808.12

Finding the Fourth Proportional to 28,383.38, 39,170.28 and 15,808.12

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Solution

The fourth proportional to 28,383.38, 39,170.28 and 15,808.12 is: 21,815.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,383.38 : 39,170.28 = 15,808.12 : x
  2. Step 2: Convert to fraction form
    28,383.38/39,170.28 = 15,808.12/x
  3. Step 3: Cross multiply
    28,383.38x = 39,170.28 × 15,808.12
  4. Step 4: Simplify right side
    28,383.38x = 619,208,486.67
  5. Step 5: Solve for x
    x = 619,208,486.67/28,383.38
  6. Step 6: Final answer
    x = 21,815.88

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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.