Home / 27,885.02-38,474.53-15,785.78

Finding the Fourth Proportional to 27,885.02, 38,474.53 and 15,785.78

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Solution

The fourth proportional to 27,885.02, 38,474.53 and 15,785.78 is: 21,780.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,885.02 : 38,474.53 = 15,785.78 : x
  2. Step 2: Convert to fraction form
    27,885.02/38,474.53 = 15,785.78/x
  3. Step 3: Cross multiply
    27,885.02x = 38,474.53 × 15,785.78
  4. Step 4: Simplify right side
    27,885.02x = 607,350,234.35
  5. Step 5: Solve for x
    x = 607,350,234.35/27,885.02
  6. Step 6: Final answer
    x = 21,780.52

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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.