Home / 18,780.85-25,915.79-11,225.66

Finding the Fourth Proportional to 18,780.85, 25,915.79 and 11,225.66

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Solution

The fourth proportional to 18,780.85, 25,915.79 and 11,225.66 is: 15,490.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,780.85 : 25,915.79 = 11,225.66 : x
  2. Step 2: Convert to fraction form
    18,780.85/25,915.79 = 11,225.66/x
  3. Step 3: Cross multiply
    18,780.85x = 25,915.79 × 11,225.66
  4. Step 4: Simplify right side
    18,780.85x = 290,921,940.03
  5. Step 5: Solve for x
    x = 290,921,940.03/18,780.85
  6. Step 6: Final answer
    x = 15,490.35

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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.