Home / 7,972.21-10,990.13-5,278.91

Finding the Fourth Proportional to 7,972.21, 10,990.13 and 5,278.91

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Solution

The fourth proportional to 7,972.21, 10,990.13 and 5,278.91 is: 7,277.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,972.21 : 10,990.13 = 5,278.91 : x
  2. Step 2: Convert to fraction form
    7,972.21/10,990.13 = 5,278.91/x
  3. Step 3: Cross multiply
    7,972.21x = 10,990.13 × 5,278.91
  4. Step 4: Simplify right side
    7,972.21x = 58,015,907.16
  5. Step 5: Solve for x
    x = 58,015,907.16/7,972.21
  6. Step 6: Final answer
    x = 7,277.27

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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.