Home / 27,708.78-38,236.68-15,772.08

Finding the Fourth Proportional to 27,708.78, 38,236.68 and 15,772.08

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Solution

The fourth proportional to 27,708.78, 38,236.68 and 15,772.08 is: 21,764.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,708.78 : 38,236.68 = 15,772.08 : x
  2. Step 2: Convert to fraction form
    27,708.78/38,236.68 = 15,772.08/x
  3. Step 3: Cross multiply
    27,708.78x = 38,236.68 × 15,772.08
  4. Step 4: Simplify right side
    27,708.78x = 603,071,975.89
  5. Step 5: Solve for x
    x = 603,071,975.89/27,708.78
  6. Step 6: Final answer
    x = 21,764.65

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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.