Home / 18,866.29-28,305.35-7,778.20

Finding the Fourth Proportional to 18,866.29, 28,305.35 and 7,778.20

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Solution

The fourth proportional to 18,866.29, 28,305.35 and 7,778.20 is: 11,669.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,866.29 : 28,305.35 = 7,778.20 : x
  2. Step 2: Convert to fraction form
    18,866.29/28,305.35 = 7,778.20/x
  3. Step 3: Cross multiply
    18,866.29x = 28,305.35 × 7,778.20
  4. Step 4: Simplify right side
    18,866.29x = 220,164,673.37
  5. Step 5: Solve for x
    x = 220,164,673.37/18,866.29
  6. Step 6: Final answer
    x = 11,669.74

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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.