Home / 27,688.03-38,209.39-15,112.78

Finding the Fourth Proportional to 27,688.03, 38,209.39 and 15,112.78

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Solution

The fourth proportional to 27,688.03, 38,209.39 and 15,112.78 is: 20,855.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,688.03 : 38,209.39 = 15,112.78 : x
  2. Step 2: Convert to fraction form
    27,688.03/38,209.39 = 15,112.78/x
  3. Step 3: Cross multiply
    27,688.03x = 38,209.39 × 15,112.78
  4. Step 4: Simplify right side
    27,688.03x = 577,449,971.70
  5. Step 5: Solve for x
    x = 577,449,971.70/27,688.03
  6. Step 6: Final answer
    x = 20,855.58

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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.