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Finding the Fourth Proportional to 12,574.80, 18,876.60 and 7,383.60

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Solution

The fourth proportional to 12,574.80, 18,876.60 and 7,383.60 is: 11,083.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,574.80 : 18,876.60 = 7,383.60 : x
  2. Step 2: Convert to fraction form
    12,574.80/18,876.60 = 7,383.60/x
  3. Step 3: Cross multiply
    12,574.80x = 18,876.60 × 7,383.60
  4. Step 4: Simplify right side
    12,574.80x = 139,377,263.76
  5. Step 5: Solve for x
    x = 139,377,263.76/12,574.80
  6. Step 6: Final answer
    x = 11,083.86

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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.