Home / 28,181.12-38,888.33-15,431.72

Finding the Fourth Proportional to 28,181.12, 38,888.33 and 15,431.72

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Solution

The fourth proportional to 28,181.12, 38,888.33 and 15,431.72 is: 21,294.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,181.12 : 38,888.33 = 15,431.72 : x
  2. Step 2: Convert to fraction form
    28,181.12/38,888.33 = 15,431.72/x
  3. Step 3: Cross multiply
    28,181.12x = 38,888.33 × 15,431.72
  4. Step 4: Simplify right side
    28,181.12x = 600,113,548.23
  5. Step 5: Solve for x
    x = 600,113,548.23/28,181.12
  6. Step 6: Final answer
    x = 21,294.88

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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.