Home / 28,176.78-38,885.16-15,601.53

Finding the Fourth Proportional to 28,176.78, 38,885.16 and 15,601.53

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Solution

The fourth proportional to 28,176.78, 38,885.16 and 15,601.53 is: 21,530.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,176.78 : 38,885.16 = 15,601.53 : x
  2. Step 2: Convert to fraction form
    28,176.78/38,885.16 = 15,601.53/x
  3. Step 3: Cross multiply
    28,176.78x = 38,885.16 × 15,601.53
  4. Step 4: Simplify right side
    28,176.78x = 606,667,990.29
  5. Step 5: Solve for x
    x = 606,667,990.29/28,176.78
  6. Step 6: Final answer
    x = 21,530.78

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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.