Home / 18,772.56-25,885.98-15,820.92

Finding the Fourth Proportional to 18,772.56, 25,885.98 and 15,820.92

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Solution

The fourth proportional to 18,772.56, 25,885.98 and 15,820.92 is: 21,815.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,772.56 : 25,885.98 = 15,820.92 : x
  2. Step 2: Convert to fraction form
    18,772.56/25,885.98 = 15,820.92/x
  3. Step 3: Cross multiply
    18,772.56x = 25,885.98 × 15,820.92
  4. Step 4: Simplify right side
    18,772.56x = 409,540,018.70
  5. Step 5: Solve for x
    x = 409,540,018.70/18,772.56
  6. Step 6: Final answer
    x = 21,815.89

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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.