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Finding the Fourth Proportional to 8,998.80, 12,418.19 and 5,019.81

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Solution

The fourth proportional to 8,998.80, 12,418.19 and 5,019.81 is: 6,927.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,998.80 : 12,418.19 = 5,019.81 : x
  2. Step 2: Convert to fraction form
    8,998.80/12,418.19 = 5,019.81/x
  3. Step 3: Cross multiply
    8,998.80x = 12,418.19 × 5,019.81
  4. Step 4: Simplify right side
    8,998.80x = 62,336,954.34
  5. Step 5: Solve for x
    x = 62,336,954.34/8,998.80
  6. Step 6: Final answer
    x = 6,927.25

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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.