Home / 13,679.64-20,519.46-3,291.40

Finding the Fourth Proportional to 13,679.64, 20,519.46 and 3,291.40

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Solution

The fourth proportional to 13,679.64, 20,519.46 and 3,291.40 is: 4,937.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,679.64 : 20,519.46 = 3,291.40 : x
  2. Step 2: Convert to fraction form
    13,679.64/20,519.46 = 3,291.40/x
  3. Step 3: Cross multiply
    13,679.64x = 20,519.46 × 3,291.40
  4. Step 4: Simplify right side
    13,679.64x = 67,537,750.64
  5. Step 5: Solve for x
    x = 67,537,750.64/13,679.64
  6. Step 6: Final answer
    x = 4,937.10

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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.