Home / 28,357.52-39,134.92-15,782.56

Finding the Fourth Proportional to 28,357.52, 39,134.92 and 15,782.56

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Solution

The fourth proportional to 28,357.52, 39,134.92 and 15,782.56 is: 21,780.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,357.52 : 39,134.92 = 15,782.56 : x
  2. Step 2: Convert to fraction form
    28,357.52/39,134.92 = 15,782.56/x
  3. Step 3: Cross multiply
    28,357.52x = 39,134.92 × 15,782.56
  4. Step 4: Simplify right side
    28,357.52x = 617,649,223.00
  5. Step 5: Solve for x
    x = 617,649,223.00/28,357.52
  6. Step 6: Final answer
    x = 21,780.79

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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.