Home / 5,220-7,203.36-3,125.28

Finding the Fourth Proportional to 5,220, 7,203.36 and 3,125.28

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Solution

The fourth proportional to 5,220, 7,203.36 and 3,125.28 is: 4,312.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,220 : 7,203.36 = 3,125.28 : x
  2. Step 2: Convert to fraction form
    5,220/7,203.36 = 3,125.28/x
  3. Step 3: Cross multiply
    5,220x = 7,203.36 × 3,125.28
  4. Step 4: Simplify right side
    5,220x = 22,512,516.94
  5. Step 5: Solve for x
    x = 22,512,516.94/5,220
  6. Step 6: Final answer
    x = 4,312.74

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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.