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Finding the Fourth Proportional to 12,218.58, 16,858.71 and 7,182.54

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Solution

The fourth proportional to 12,218.58, 16,858.71 and 7,182.54 is: 9,910.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,218.58 : 16,858.71 = 7,182.54 : x
  2. Step 2: Convert to fraction form
    12,218.58/16,858.71 = 7,182.54/x
  3. Step 3: Cross multiply
    12,218.58x = 16,858.71 × 7,182.54
  4. Step 4: Simplify right side
    12,218.58x = 121,088,358.92
  5. Step 5: Solve for x
    x = 121,088,358.92/12,218.58
  6. Step 6: Final answer
    x = 9,910.18

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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.