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Finding the Fourth Proportional to 8,541.86, 12,820.78 and 5,261.36

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Solution

The fourth proportional to 8,541.86, 12,820.78 and 5,261.36 is: 7,896.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,541.86 : 12,820.78 = 5,261.36 : x
  2. Step 2: Convert to fraction form
    8,541.86/12,820.78 = 5,261.36/x
  3. Step 3: Cross multiply
    8,541.86x = 12,820.78 × 5,261.36
  4. Step 4: Simplify right side
    8,541.86x = 67,454,739.06
  5. Step 5: Solve for x
    x = 67,454,739.06/8,541.86
  6. Step 6: Final answer
    x = 7,896.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.