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Finding the Fourth Proportional to 8,334.78, 12,490.65 and 8,130.66

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Solution

The fourth proportional to 8,334.78, 12,490.65 and 8,130.66 is: 12,184.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,334.78 : 12,490.65 = 8,130.66 : x
  2. Step 2: Convert to fraction form
    8,334.78/12,490.65 = 8,130.66/x
  3. Step 3: Cross multiply
    8,334.78x = 12,490.65 × 8,130.66
  4. Step 4: Simplify right side
    8,334.78x = 101,557,228.33
  5. Step 5: Solve for x
    x = 101,557,228.33/8,334.78
  6. Step 6: Final answer
    x = 12,184.75

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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.