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Finding the Fourth Proportional to 5,220.90, 7,815.15 and 4,637.70

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Solution

The fourth proportional to 5,220.90, 7,815.15 and 4,637.70 is: 6,942.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,220.90 : 7,815.15 = 4,637.70 : x
  2. Step 2: Convert to fraction form
    5,220.90/7,815.15 = 4,637.70/x
  3. Step 3: Cross multiply
    5,220.90x = 7,815.15 × 4,637.70
  4. Step 4: Simplify right side
    5,220.90x = 36,244,321.16
  5. Step 5: Solve for x
    x = 36,244,321.16/5,220.90
  6. Step 6: Final answer
    x = 6,942.16

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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.