Home / 13,955.99-20,943.30-5,191.79

Finding the Fourth Proportional to 13,955.99, 20,943.30 and 5,191.79

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Solution

The fourth proportional to 13,955.99, 20,943.30 and 5,191.79 is: 7,791.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,955.99 : 20,943.30 = 5,191.79 : x
  2. Step 2: Convert to fraction form
    13,955.99/20,943.30 = 5,191.79/x
  3. Step 3: Cross multiply
    13,955.99x = 20,943.30 × 5,191.79
  4. Step 4: Simplify right side
    13,955.99x = 108,733,215.51
  5. Step 5: Solve for x
    x = 108,733,215.51/13,955.99
  6. Step 6: Final answer
    x = 7,791.15

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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.