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Finding the Fourth Proportional to 8,918.80, 13,367.22 and 5,015.05

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Solution

The fourth proportional to 8,918.80, 13,367.22 and 5,015.05 is: 7,516.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,918.80 : 13,367.22 = 5,015.05 : x
  2. Step 2: Convert to fraction form
    8,918.80/13,367.22 = 5,015.05/x
  3. Step 3: Cross multiply
    8,918.80x = 13,367.22 × 5,015.05
  4. Step 4: Simplify right side
    8,918.80x = 67,037,276.66
  5. Step 5: Solve for x
    x = 67,037,276.66/8,918.80
  6. Step 6: Final answer
    x = 7,516.40

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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.