Home / 10,515.39-15,771.27-3,940.23

Finding the Fourth Proportional to 10,515.39, 15,771.27 and 3,940.23

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Solution

The fourth proportional to 10,515.39, 15,771.27 and 3,940.23 is: 5,909.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,515.39 : 15,771.27 = 3,940.23 : x
  2. Step 2: Convert to fraction form
    10,515.39/15,771.27 = 3,940.23/x
  3. Step 3: Cross multiply
    10,515.39x = 15,771.27 × 3,940.23
  4. Step 4: Simplify right side
    10,515.39x = 62,142,431.19
  5. Step 5: Solve for x
    x = 62,142,431.19/10,515.39
  6. Step 6: Final answer
    x = 5,909.66

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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.