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Finding the Fourth Proportional to 8,955.25, 12,361.55 and 7,691.22

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Solution

The fourth proportional to 8,955.25, 12,361.55 and 7,691.22 is: 10,616.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,955.25 : 12,361.55 = 7,691.22 : x
  2. Step 2: Convert to fraction form
    8,955.25/12,361.55 = 7,691.22/x
  3. Step 3: Cross multiply
    8,955.25x = 12,361.55 × 7,691.22
  4. Step 4: Simplify right side
    8,955.25x = 95,075,362.13
  5. Step 5: Solve for x
    x = 95,075,362.13/8,955.25
  6. Step 6: Final answer
    x = 10,616.72

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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.