Home / 28,426.79-39,229.25-15,680.48

Finding the Fourth Proportional to 28,426.79, 39,229.25 and 15,680.48

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Solution

The fourth proportional to 28,426.79, 39,229.25 and 15,680.48 is: 21,639.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,426.79 : 39,229.25 = 15,680.48 : x
  2. Step 2: Convert to fraction form
    28,426.79/39,229.25 = 15,680.48/x
  3. Step 3: Cross multiply
    28,426.79x = 39,229.25 × 15,680.48
  4. Step 4: Simplify right side
    28,426.79x = 615,133,195.49
  5. Step 5: Solve for x
    x = 615,133,195.49/28,426.79
  6. Step 6: Final answer
    x = 21,639.21

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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.