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Finding the Fourth Proportional to 5,187.50, 7,764.60 and 2,718.80

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Solution

The fourth proportional to 5,187.50, 7,764.60 and 2,718.80 is: 4,069.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,187.50 : 7,764.60 = 2,718.80 : x
  2. Step 2: Convert to fraction form
    5,187.50/7,764.60 = 2,718.80/x
  3. Step 3: Cross multiply
    5,187.50x = 7,764.60 × 2,718.80
  4. Step 4: Simplify right side
    5,187.50x = 21,110,394.48
  5. Step 5: Solve for x
    x = 21,110,394.48/5,187.50
  6. Step 6: Final answer
    x = 4,069.47

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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.