Home / 13,719.80-20,579.70-3,859.40

Finding the Fourth Proportional to 13,719.80, 20,579.70 and 3,859.40

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Solution

The fourth proportional to 13,719.80, 20,579.70 and 3,859.40 is: 5,789.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,719.80 : 20,579.70 = 3,859.40 : x
  2. Step 2: Convert to fraction form
    13,719.80/20,579.70 = 3,859.40/x
  3. Step 3: Cross multiply
    13,719.80x = 20,579.70 × 3,859.40
  4. Step 4: Simplify right side
    13,719.80x = 79,425,294.18
  5. Step 5: Solve for x
    x = 79,425,294.18/13,719.80
  6. Step 6: Final answer
    x = 5,789.10

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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.