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Finding the Fourth Proportional to 8,419.72, 11,634.66 and 8,015.08

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Solution

The fourth proportional to 8,419.72, 11,634.66 and 8,015.08 is: 11,075.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,419.72 : 11,634.66 = 8,015.08 : x
  2. Step 2: Convert to fraction form
    8,419.72/11,634.66 = 8,015.08/x
  3. Step 3: Cross multiply
    8,419.72x = 11,634.66 × 8,015.08
  4. Step 4: Simplify right side
    8,419.72x = 93,252,730.67
  5. Step 5: Solve for x
    x = 93,252,730.67/8,419.72
  6. Step 6: Final answer
    x = 11,075.51

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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.