Home / 7,130.25-9,839.96-3,986.45

Finding the Fourth Proportional to 7,130.25, 9,839.96 and 3,986.45

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Solution

The fourth proportional to 7,130.25, 9,839.96 and 3,986.45 is: 5,501.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,130.25 : 9,839.96 = 3,986.45 : x
  2. Step 2: Convert to fraction form
    7,130.25/9,839.96 = 3,986.45/x
  3. Step 3: Cross multiply
    7,130.25x = 9,839.96 × 3,986.45
  4. Step 4: Simplify right side
    7,130.25x = 39,226,439.41
  5. Step 5: Solve for x
    x = 39,226,439.41/7,130.25
  6. Step 6: Final answer
    x = 5,501.41

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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.