Home / 27,378.14-37,782.88-15,440.78

Finding the Fourth Proportional to 27,378.14, 37,782.88 and 15,440.78

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Solution

The fourth proportional to 27,378.14, 37,782.88 and 15,440.78 is: 21,308.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,378.14 : 37,782.88 = 15,440.78 : x
  2. Step 2: Convert to fraction form
    27,378.14/37,782.88 = 15,440.78/x
  3. Step 3: Cross multiply
    27,378.14x = 37,782.88 × 15,440.78
  4. Step 4: Simplify right side
    27,378.14x = 583,397,137.85
  5. Step 5: Solve for x
    x = 583,397,137.85/27,378.14
  6. Step 6: Final answer
    x = 21,308.87

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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.