Home / 20,109.49-27,748.87-11,154.76

Finding the Fourth Proportional to 20,109.49, 27,748.87 and 11,154.76

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Solution

The fourth proportional to 20,109.49, 27,748.87 and 11,154.76 is: 15,392.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,109.49 : 27,748.87 = 11,154.76 : x
  2. Step 2: Convert to fraction form
    20,109.49/27,748.87 = 11,154.76/x
  3. Step 3: Cross multiply
    20,109.49x = 27,748.87 × 11,154.76
  4. Step 4: Simplify right side
    20,109.49x = 309,531,985.12
  5. Step 5: Solve for x
    x = 309,531,985.12/20,109.49
  6. Step 6: Final answer
    x = 15,392.33

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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.