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Finding the Fourth Proportional to 7,515.54, 10,365.15 and 5,631.54

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Solution

The fourth proportional to 7,515.54, 10,365.15 and 5,631.54 is: 7,766.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,515.54 : 10,365.15 = 5,631.54 : x
  2. Step 2: Convert to fraction form
    7,515.54/10,365.15 = 5,631.54/x
  3. Step 3: Cross multiply
    7,515.54x = 10,365.15 × 5,631.54
  4. Step 4: Simplify right side
    7,515.54x = 58,371,756.83
  5. Step 5: Solve for x
    x = 58,371,756.83/7,515.54
  6. Step 6: Final answer
    x = 7,766.81

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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.