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Finding the Fourth Proportional to 8,886.78, 12,261.54 and 5,057.54

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Solution

The fourth proportional to 8,886.78, 12,261.54 and 5,057.54 is: 6,978.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,886.78 : 12,261.54 = 5,057.54 : x
  2. Step 2: Convert to fraction form
    8,886.78/12,261.54 = 5,057.54/x
  3. Step 3: Cross multiply
    8,886.78x = 12,261.54 × 5,057.54
  4. Step 4: Simplify right side
    8,886.78x = 62,013,232.65
  5. Step 5: Solve for x
    x = 62,013,232.65/8,886.78
  6. Step 6: Final answer
    x = 6,978.14

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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.