Home / 13,909.15-19,195.11-7,621.51

Finding the Fourth Proportional to 13,909.15, 19,195.11 and 7,621.51

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Solution

The fourth proportional to 13,909.15, 19,195.11 and 7,621.51 is: 10,517.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,909.15 : 19,195.11 = 7,621.51 : x
  2. Step 2: Convert to fraction form
    13,909.15/19,195.11 = 7,621.51/x
  3. Step 3: Cross multiply
    13,909.15x = 19,195.11 × 7,621.51
  4. Step 4: Simplify right side
    13,909.15x = 146,295,722.82
  5. Step 5: Solve for x
    x = 146,295,722.82/13,909.15
  6. Step 6: Final answer
    x = 10,517.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.