Home / 21,022.38-31,518.99-9,919.71

Finding the Fourth Proportional to 21,022.38, 31,518.99 and 9,919.71

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Solution

The fourth proportional to 21,022.38, 31,518.99 and 9,919.71 is: 14,872.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,022.38 : 31,518.99 = 9,919.71 : x
  2. Step 2: Convert to fraction form
    21,022.38/31,518.99 = 9,919.71/x
  3. Step 3: Cross multiply
    21,022.38x = 31,518.99 × 9,919.71
  4. Step 4: Simplify right side
    21,022.38x = 312,659,240.29
  5. Step 5: Solve for x
    x = 312,659,240.29/21,022.38
  6. Step 6: Final answer
    x = 14,872.69

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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.