Home / 28,456.20-39,268.34-15,880.84

Finding the Fourth Proportional to 28,456.20, 39,268.34 and 15,880.84

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Solution

The fourth proportional to 28,456.20, 39,268.34 and 15,880.84 is: 21,914.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,456.20 : 39,268.34 = 15,880.84 : x
  2. Step 2: Convert to fraction form
    28,456.20/39,268.34 = 15,880.84/x
  3. Step 3: Cross multiply
    28,456.20x = 39,268.34 × 15,880.84
  4. Step 4: Simplify right side
    28,456.20x = 623,614,224.61
  5. Step 5: Solve for x
    x = 623,614,224.61/28,456.20
  6. Step 6: Final answer
    x = 21,914.88

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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.