Home / 13,909.05-19,194.75-7,621.38

Finding the Fourth Proportional to 13,909.05, 19,194.75 and 7,621.38

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Solution

The fourth proportional to 13,909.05, 19,194.75 and 7,621.38 is: 10,517.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,909.05 : 19,194.75 = 7,621.38 : x
  2. Step 2: Convert to fraction form
    13,909.05/19,194.75 = 7,621.38/x
  3. Step 3: Cross multiply
    13,909.05x = 19,194.75 × 7,621.38
  4. Step 4: Simplify right side
    13,909.05x = 146,290,483.76
  5. Step 5: Solve for x
    x = 146,290,483.76/13,909.05
  6. Step 6: Final answer
    x = 10,517.65

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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.