Home / 4,087.50-5,640.75-2,431.50

Finding the Fourth Proportional to 4,087.50, 5,640.75 and 2,431.50

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Solution

The fourth proportional to 4,087.50, 5,640.75 and 2,431.50 is: 3,355.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,087.50 : 5,640.75 = 2,431.50 : x
  2. Step 2: Convert to fraction form
    4,087.50/5,640.75 = 2,431.50/x
  3. Step 3: Cross multiply
    4,087.50x = 5,640.75 × 2,431.50
  4. Step 4: Simplify right side
    4,087.50x = 13,715,483.63
  5. Step 5: Solve for x
    x = 13,715,483.63/4,087.50
  6. Step 6: Final answer
    x = 3,355.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.