Home / 15,278.09-21,083.55-8,563.70

Finding the Fourth Proportional to 15,278.09, 21,083.55 and 8,563.70

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Solution

The fourth proportional to 15,278.09, 21,083.55 and 8,563.70 is: 11,817.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,278.09 : 21,083.55 = 8,563.70 : x
  2. Step 2: Convert to fraction form
    15,278.09/21,083.55 = 8,563.70/x
  3. Step 3: Cross multiply
    15,278.09x = 21,083.55 × 8,563.70
  4. Step 4: Simplify right side
    15,278.09x = 180,553,091.72
  5. Step 5: Solve for x
    x = 180,553,091.72/15,278.09
  6. Step 6: Final answer
    x = 11,817.78

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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.