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Finding the Fourth Proportional to 8,878.78, 13,250.65 and 7,894.66

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Solution

The fourth proportional to 8,878.78, 13,250.65 and 7,894.66 is: 11,781.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,878.78 : 13,250.65 = 7,894.66 : x
  2. Step 2: Convert to fraction form
    8,878.78/13,250.65 = 7,894.66/x
  3. Step 3: Cross multiply
    8,878.78x = 13,250.65 × 7,894.66
  4. Step 4: Simplify right side
    8,878.78x = 104,609,376.53
  5. Step 5: Solve for x
    x = 104,609,376.53/8,878.78
  6. Step 6: Final answer
    x = 11,781.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.