Home / 5,121.41-7,681.77-1,423.57

Finding the Fourth Proportional to 5,121.41, 7,681.77 and 1,423.57

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Solution

The fourth proportional to 5,121.41, 7,681.77 and 1,423.57 is: 2,135.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,121.41 : 7,681.77 = 1,423.57 : x
  2. Step 2: Convert to fraction form
    5,121.41/7,681.77 = 1,423.57/x
  3. Step 3: Cross multiply
    5,121.41x = 7,681.77 × 1,423.57
  4. Step 4: Simplify right side
    5,121.41x = 10,935,498.91
  5. Step 5: Solve for x
    x = 10,935,498.91/5,121.41
  6. Step 6: Final answer
    x = 2,135.25

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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.