Home / 20,388.24-28,148.04-13,326.48

Finding the Fourth Proportional to 20,388.24, 28,148.04 and 13,326.48

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Solution

The fourth proportional to 20,388.24, 28,148.04 and 13,326.48 is: 18,398.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,388.24 : 28,148.04 = 13,326.48 : x
  2. Step 2: Convert to fraction form
    20,388.24/28,148.04 = 13,326.48/x
  3. Step 3: Cross multiply
    20,388.24x = 28,148.04 × 13,326.48
  4. Step 4: Simplify right side
    20,388.24x = 375,114,292.10
  5. Step 5: Solve for x
    x = 375,114,292.10/20,388.24
  6. Step 6: Final answer
    x = 18,398.56

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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.