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Finding the Fourth Proportional to 8,784.88, 12,122.54 and 5,199.66

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Solution

The fourth proportional to 8,784.88, 12,122.54 and 5,199.66 is: 7,175.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,784.88 : 12,122.54 = 5,199.66 : x
  2. Step 2: Convert to fraction form
    8,784.88/12,122.54 = 5,199.66/x
  3. Step 3: Cross multiply
    8,784.88x = 12,122.54 × 5,199.66
  4. Step 4: Simplify right side
    8,784.88x = 63,033,027.77
  5. Step 5: Solve for x
    x = 63,033,027.77/8,784.88
  6. Step 6: Final answer
    x = 7,175.17

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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.