Home / 20,404.99-28,151.65-13,335.51

Finding the Fourth Proportional to 20,404.99, 28,151.65 and 13,335.51

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Solution

The fourth proportional to 20,404.99, 28,151.65 and 13,335.51 is: 18,398.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,404.99 : 28,151.65 = 13,335.51 : x
  2. Step 2: Convert to fraction form
    20,404.99/28,151.65 = 13,335.51/x
  3. Step 3: Cross multiply
    20,404.99x = 28,151.65 × 13,335.51
  4. Step 4: Simplify right side
    20,404.99x = 375,416,610.09
  5. Step 5: Solve for x
    x = 375,416,610.09/20,404.99
  6. Step 6: Final answer
    x = 18,398.27

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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.