Home / 5,126.51-7,689.79-1,428.74

Finding the Fourth Proportional to 5,126.51, 7,689.79 and 1,428.74

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Solution

The fourth proportional to 5,126.51, 7,689.79 and 1,428.74 is: 2,143.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,126.51 : 7,689.79 = 1,428.74 : x
  2. Step 2: Convert to fraction form
    5,126.51/7,689.79 = 1,428.74/x
  3. Step 3: Cross multiply
    5,126.51x = 7,689.79 × 1,428.74
  4. Step 4: Simplify right side
    5,126.51x = 10,986,710.56
  5. Step 5: Solve for x
    x = 10,986,710.56/5,126.51
  6. Step 6: Final answer
    x = 2,143.12

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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.