Home / 15,399.71-21,239.52-11,151.41

Finding the Fourth Proportional to 15,399.71, 21,239.52 and 11,151.41

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Solution

The fourth proportional to 15,399.71, 21,239.52 and 11,151.41 is: 15,380.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,399.71 : 21,239.52 = 11,151.41 : x
  2. Step 2: Convert to fraction form
    15,399.71/21,239.52 = 11,151.41/x
  3. Step 3: Cross multiply
    15,399.71x = 21,239.52 × 11,151.41
  4. Step 4: Simplify right side
    15,399.71x = 236,850,595.72
  5. Step 5: Solve for x
    x = 236,850,595.72/15,399.71
  6. Step 6: Final answer
    x = 15,380.20

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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.