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Finding the Fourth Proportional to 18,707.74, 28,022.72 and 8,854.90

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Solution

The fourth proportional to 18,707.74, 28,022.72 and 8,854.90 is: 13,263.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,707.74 : 28,022.72 = 8,854.90 : x
  2. Step 2: Convert to fraction form
    18,707.74/28,022.72 = 8,854.90/x
  3. Step 3: Cross multiply
    18,707.74x = 28,022.72 × 8,854.90
  4. Step 4: Simplify right side
    18,707.74x = 248,138,383.33
  5. Step 5: Solve for x
    x = 248,138,383.33/18,707.74
  6. Step 6: Final answer
    x = 13,263.94

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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.