Home / 5,386.57-8,081.07-1,688.78

Finding the Fourth Proportional to 5,386.57, 8,081.07 and 1,688.78

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Solution

The fourth proportional to 5,386.57, 8,081.07 and 1,688.78 is: 2,533.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,386.57 : 8,081.07 = 1,688.78 : x
  2. Step 2: Convert to fraction form
    5,386.57/8,081.07 = 1,688.78/x
  3. Step 3: Cross multiply
    5,386.57x = 8,081.07 × 1,688.78
  4. Step 4: Simplify right side
    5,386.57x = 13,647,163.26
  5. Step 5: Solve for x
    x = 13,647,163.26/5,386.57
  6. Step 6: Final answer
    x = 2,533.55

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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.