Home / 27,690.31-38,212.61-15,115.06

Finding the Fourth Proportional to 27,690.31, 38,212.61 and 15,115.06

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Solution

The fourth proportional to 27,690.31, 38,212.61 and 15,115.06 is: 20,858.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,690.31 : 38,212.61 = 15,115.06 : x
  2. Step 2: Convert to fraction form
    27,690.31/38,212.61 = 15,115.06/x
  3. Step 3: Cross multiply
    27,690.31x = 38,212.61 × 15,115.06
  4. Step 4: Simplify right side
    27,690.31x = 577,585,892.91
  5. Step 5: Solve for x
    x = 577,585,892.91/27,690.31
  6. Step 6: Final answer
    x = 20,858.77

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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.