Home / 5,121.51-7,681.01-1,422.87

Finding the Fourth Proportional to 5,121.51, 7,681.01 and 1,422.87

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Solution

The fourth proportional to 5,121.51, 7,681.01 and 1,422.87 is: 2,133.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,121.51 : 7,681.01 = 1,422.87 : x
  2. Step 2: Convert to fraction form
    5,121.51/7,681.01 = 1,422.87/x
  3. Step 3: Cross multiply
    5,121.51x = 7,681.01 × 1,422.87
  4. Step 4: Simplify right side
    5,121.51x = 10,929,071.58
  5. Step 5: Solve for x
    x = 10,929,071.58/5,121.51
  6. Step 6: Final answer
    x = 2,133.95

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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.