Home / 13,291.02-19,931.85-3,928.55

Finding the Fourth Proportional to 13,291.02, 19,931.85 and 3,928.55

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Solution

The fourth proportional to 13,291.02, 19,931.85 and 3,928.55 is: 5,891.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,291.02 : 19,931.85 = 3,928.55 : x
  2. Step 2: Convert to fraction form
    13,291.02/19,931.85 = 3,928.55/x
  3. Step 3: Cross multiply
    13,291.02x = 19,931.85 × 3,928.55
  4. Step 4: Simplify right side
    13,291.02x = 78,303,169.66
  5. Step 5: Solve for x
    x = 78,303,169.66/13,291.02
  6. Step 6: Final answer
    x = 5,891.43

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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.