Home / 20,231.36-27,909.44-15,747.20

Finding the Fourth Proportional to 20,231.36, 27,909.44 and 15,747.20

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Solution

The fourth proportional to 20,231.36, 27,909.44 and 15,747.20 is: 21,723.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,231.36 : 27,909.44 = 15,747.20 : x
  2. Step 2: Convert to fraction form
    20,231.36/27,909.44 = 15,747.20/x
  3. Step 3: Cross multiply
    20,231.36x = 27,909.44 × 15,747.20
  4. Step 4: Simplify right side
    20,231.36x = 439,495,533.57
  5. Step 5: Solve for x
    x = 439,495,533.57/20,231.36
  6. Step 6: Final answer
    x = 21,723.48

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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.