Home / 10,919.58-15,034.46-9,921.87

Finding the Fourth Proportional to 10,919.58, 15,034.46 and 9,921.87

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Solution

The fourth proportional to 10,919.58, 15,034.46 and 9,921.87 is: 13,660.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,919.58 : 15,034.46 = 9,921.87 : x
  2. Step 2: Convert to fraction form
    10,919.58/15,034.46 = 9,921.87/x
  3. Step 3: Cross multiply
    10,919.58x = 15,034.46 × 9,921.87
  4. Step 4: Simplify right side
    10,919.58x = 149,169,908.03
  5. Step 5: Solve for x
    x = 149,169,908.03/10,919.58
  6. Step 6: Final answer
    x = 13,660.77

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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.