Home / 7,145.12-9,860.28-4,001.36

Finding the Fourth Proportional to 7,145.12, 9,860.28 and 4,001.36

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Solution

The fourth proportional to 7,145.12, 9,860.28 and 4,001.36 is: 5,521.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,145.12 : 9,860.28 = 4,001.36 : x
  2. Step 2: Convert to fraction form
    7,145.12/9,860.28 = 4,001.36/x
  3. Step 3: Cross multiply
    7,145.12x = 9,860.28 × 4,001.36
  4. Step 4: Simplify right side
    7,145.12x = 39,454,529.98
  5. Step 5: Solve for x
    x = 39,454,529.98/7,145.12
  6. Step 6: Final answer
    x = 5,521.88

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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.