Home / 13,815.79-20,720.70-3,952.42

Finding the Fourth Proportional to 13,815.79, 20,720.70 and 3,952.42

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Solution

The fourth proportional to 13,815.79, 20,720.70 and 3,952.42 is: 5,927.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,815.79 : 20,720.70 = 3,952.42 : x
  2. Step 2: Convert to fraction form
    13,815.79/20,720.70 = 3,952.42/x
  3. Step 3: Cross multiply
    13,815.79x = 20,720.70 × 3,952.42
  4. Step 4: Simplify right side
    13,815.79x = 81,896,909.09
  5. Step 5: Solve for x
    x = 81,896,909.09/13,815.79
  6. Step 6: Final answer
    x = 5,927.78

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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.