Home / 27,617.87-38,113.67-15,680.90

Finding the Fourth Proportional to 27,617.87, 38,113.67 and 15,680.90

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Solution

The fourth proportional to 27,617.87, 38,113.67 and 15,680.90 is: 21,640.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,617.87 : 38,113.67 = 15,680.90 : x
  2. Step 2: Convert to fraction form
    27,617.87/38,113.67 = 15,680.90/x
  3. Step 3: Cross multiply
    27,617.87x = 38,113.67 × 15,680.90
  4. Step 4: Simplify right side
    27,617.87x = 597,656,647.90
  5. Step 5: Solve for x
    x = 597,656,647.90/27,617.87
  6. Step 6: Final answer
    x = 21,640.22

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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.