Home / 28,435.29-39,240.78-15,860.85

Finding the Fourth Proportional to 28,435.29, 39,240.78 and 15,860.85

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Solution

The fourth proportional to 28,435.29, 39,240.78 and 15,860.85 is: 21,888.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,435.29 : 39,240.78 = 15,860.85 : x
  2. Step 2: Convert to fraction form
    28,435.29/39,240.78 = 15,860.85/x
  3. Step 3: Cross multiply
    28,435.29x = 39,240.78 × 15,860.85
  4. Step 4: Simplify right side
    28,435.29x = 622,392,125.46
  5. Step 5: Solve for x
    x = 622,392,125.46/28,435.29
  6. Step 6: Final answer
    x = 21,888.02

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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.