Home / 15,278.16-21,083.79-8,563.78

Finding the Fourth Proportional to 15,278.16, 21,083.79 and 8,563.78

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Solution

The fourth proportional to 15,278.16, 21,083.79 and 8,563.78 is: 11,817.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,278.16 : 21,083.79 = 8,563.78 : x
  2. Step 2: Convert to fraction form
    15,278.16/21,083.79 = 8,563.78/x
  3. Step 3: Cross multiply
    15,278.16x = 21,083.79 × 8,563.78
  4. Step 4: Simplify right side
    15,278.16x = 180,556,939.13
  5. Step 5: Solve for x
    x = 180,556,939.13/15,278.16
  6. Step 6: Final answer
    x = 11,817.98

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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.