Home / 3,715.50-5,128.19-2,223.75

Finding the Fourth Proportional to 3,715.50, 5,128.19 and 2,223.75

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Solution

The fourth proportional to 3,715.50, 5,128.19 and 2,223.75 is: 3,069.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,715.50 : 5,128.19 = 2,223.75 : x
  2. Step 2: Convert to fraction form
    3,715.50/5,128.19 = 2,223.75/x
  3. Step 3: Cross multiply
    3,715.50x = 5,128.19 × 2,223.75
  4. Step 4: Simplify right side
    3,715.50x = 11,403,812.51
  5. Step 5: Solve for x
    x = 11,403,812.51/3,715.50
  6. Step 6: Final answer
    x = 3,069.25

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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.