Home / 20,684.52-31,015.05-18,921.24

Finding the Fourth Proportional to 20,684.52, 31,015.05 and 18,921.24

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Solution

The fourth proportional to 20,684.52, 31,015.05 and 18,921.24 is: 28,371.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,684.52 : 31,015.05 = 18,921.24 : x
  2. Step 2: Convert to fraction form
    20,684.52/31,015.05 = 18,921.24/x
  3. Step 3: Cross multiply
    20,684.52x = 31,015.05 × 18,921.24
  4. Step 4: Simplify right side
    20,684.52x = 586,843,204.66
  5. Step 5: Solve for x
    x = 586,843,204.66/20,684.52
  6. Step 6: Final answer
    x = 28,371.13

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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.