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Finding the Fourth Proportional to 5,220.72, 7,763.88 and 5,056.68

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Solution

The fourth proportional to 5,220.72, 7,763.88 and 5,056.68 is: 7,519.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,220.72 : 7,763.88 = 5,056.68 : x
  2. Step 2: Convert to fraction form
    5,220.72/7,763.88 = 5,056.68/x
  3. Step 3: Cross multiply
    5,220.72x = 7,763.88 × 5,056.68
  4. Step 4: Simplify right side
    5,220.72x = 39,259,456.72
  5. Step 5: Solve for x
    x = 39,259,456.72/5,220.72
  6. Step 6: Final answer
    x = 7,519.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.