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Finding the Fourth Proportional to 15,153.78, 20,912.13 and 8,866.02

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Solution

The fourth proportional to 15,153.78, 20,912.13 and 8,866.02 is: 12,235.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,153.78 : 20,912.13 = 8,866.02 : x
  2. Step 2: Convert to fraction form
    15,153.78/20,912.13 = 8,866.02/x
  3. Step 3: Cross multiply
    15,153.78x = 20,912.13 × 8,866.02
  4. Step 4: Simplify right side
    15,153.78x = 185,407,362.82
  5. Step 5: Solve for x
    x = 185,407,362.82/15,153.78
  6. Step 6: Final answer
    x = 12,235.06

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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.