Home / 20,108.48-27,748.45-11,155.80

Finding the Fourth Proportional to 20,108.48, 27,748.45 and 11,155.80

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Solution

The fourth proportional to 20,108.48, 27,748.45 and 11,155.80 is: 15,394.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,108.48 : 27,748.45 = 11,155.80 : x
  2. Step 2: Convert to fraction form
    20,108.48/27,748.45 = 11,155.80/x
  3. Step 3: Cross multiply
    20,108.48x = 27,748.45 × 11,155.80
  4. Step 4: Simplify right side
    20,108.48x = 309,556,158.51
  5. Step 5: Solve for x
    x = 309,556,158.51/20,108.48
  6. Step 6: Final answer
    x = 15,394.31

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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.