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Finding the Fourth Proportional to 12,219.36, 16,870.36 and 8,397.58

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Solution

The fourth proportional to 12,219.36, 16,870.36 and 8,397.58 is: 11,593.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,219.36 : 16,870.36 = 8,397.58 : x
  2. Step 2: Convert to fraction form
    12,219.36/16,870.36 = 8,397.58/x
  3. Step 3: Cross multiply
    12,219.36x = 16,870.36 × 8,397.58
  4. Step 4: Simplify right side
    12,219.36x = 141,670,197.73
  5. Step 5: Solve for x
    x = 141,670,197.73/12,219.36
  6. Step 6: Final answer
    x = 11,593.91

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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.