Home / 5,231.49-7,840.85-2,891.40

Finding the Fourth Proportional to 5,231.49, 7,840.85 and 2,891.40

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Solution

The fourth proportional to 5,231.49, 7,840.85 and 2,891.40 is: 4,333.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,231.49 : 7,840.85 = 2,891.40 : x
  2. Step 2: Convert to fraction form
    5,231.49/7,840.85 = 2,891.40/x
  3. Step 3: Cross multiply
    5,231.49x = 7,840.85 × 2,891.40
  4. Step 4: Simplify right side
    5,231.49x = 22,671,006.09
  5. Step 5: Solve for x
    x = 22,671,006.09/5,231.49
  6. Step 6: Final answer
    x = 4,333.57

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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.