Home / 20,109.87-27,754.95-11,160.25

Finding the Fourth Proportional to 20,109.87, 27,754.95 and 11,160.25

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Solution

The fourth proportional to 20,109.87, 27,754.95 and 11,160.25 is: 15,402.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,109.87 : 27,754.95 = 11,160.25 : x
  2. Step 2: Convert to fraction form
    20,109.87/27,754.95 = 11,160.25/x
  3. Step 3: Cross multiply
    20,109.87x = 27,754.95 × 11,160.25
  4. Step 4: Simplify right side
    20,109.87x = 309,752,041.96
  5. Step 5: Solve for x
    x = 309,752,041.96/20,109.87
  6. Step 6: Final answer
    x = 15,402.99

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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.