Home / 5,126.65-7,689.98-1,428.89

Finding the Fourth Proportional to 5,126.65, 7,689.98 and 1,428.89

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Solution

The fourth proportional to 5,126.65, 7,689.98 and 1,428.89 is: 2,143.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,126.65 : 7,689.98 = 1,428.89 : x
  2. Step 2: Convert to fraction form
    5,126.65/7,689.98 = 1,428.89/x
  3. Step 3: Cross multiply
    5,126.65x = 7,689.98 × 1,428.89
  4. Step 4: Simplify right side
    5,126.65x = 10,988,135.52
  5. Step 5: Solve for x
    x = 10,988,135.52/5,126.65
  6. Step 6: Final answer
    x = 2,143.34

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1.5x scale

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.