Home / 21,119.40-31,544.22-19,115.04

Finding the Fourth Proportional to 21,119.40, 31,544.22 and 19,115.04

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Solution

The fourth proportional to 21,119.40, 31,544.22 and 19,115.04 is: 28,550.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,119.40 : 31,544.22 = 19,115.04 : x
  2. Step 2: Convert to fraction form
    21,119.40/31,544.22 = 19,115.04/x
  3. Step 3: Cross multiply
    21,119.40x = 31,544.22 × 19,115.04
  4. Step 4: Simplify right side
    21,119.40x = 602,969,027.07
  5. Step 5: Solve for x
    x = 602,969,027.07/21,119.40
  6. Step 6: Final answer
    x = 28,550.48

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.