Home / 13,909.78-19,194.69-7,621.06

Finding the Fourth Proportional to 13,909.78, 19,194.69 and 7,621.06

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Solution

The fourth proportional to 13,909.78, 19,194.69 and 7,621.06 is: 10,516.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,909.78 : 19,194.69 = 7,621.06 : x
  2. Step 2: Convert to fraction form
    13,909.78/19,194.69 = 7,621.06/x
  3. Step 3: Cross multiply
    13,909.78x = 19,194.69 × 7,621.06
  4. Step 4: Simplify right side
    13,909.78x = 146,283,884.17
  5. Step 5: Solve for x
    x = 146,283,884.17/13,909.78
  6. Step 6: Final answer
    x = 10,516.62

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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.