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Finding the Fourth Proportional to 8,971.19, 13,458.94 and 2,815.19

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Solution

The fourth proportional to 8,971.19, 13,458.94 and 2,815.19 is: 4,223.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,971.19 : 13,458.94 = 2,815.19 : x
  2. Step 2: Convert to fraction form
    8,971.19/13,458.94 = 2,815.19/x
  3. Step 3: Cross multiply
    8,971.19x = 13,458.94 × 2,815.19
  4. Step 4: Simplify right side
    8,971.19x = 37,889,473.30
  5. Step 5: Solve for x
    x = 37,889,473.30/8,971.19
  6. Step 6: Final answer
    x = 4,223.46

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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.