Home / 15,821.10-21,836.79-11,112.30

Finding the Fourth Proportional to 15,821.10, 21,836.79 and 11,112.30

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Solution

The fourth proportional to 15,821.10, 21,836.79 and 11,112.30 is: 15,337.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,821.10 : 21,836.79 = 11,112.30 : x
  2. Step 2: Convert to fraction form
    15,821.10/21,836.79 = 11,112.30/x
  3. Step 3: Cross multiply
    15,821.10x = 21,836.79 × 11,112.30
  4. Step 4: Simplify right side
    15,821.10x = 242,656,961.52
  5. Step 5: Solve for x
    x = 242,656,961.52/15,821.10
  6. Step 6: Final answer
    x = 15,337.55

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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.