Home / 28,470.92-39,290.07-15,723.74

Finding the Fourth Proportional to 28,470.92, 39,290.07 and 15,723.74

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Solution

The fourth proportional to 28,470.92, 39,290.07 and 15,723.74 is: 21,698.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,470.92 : 39,290.07 = 15,723.74 : x
  2. Step 2: Convert to fraction form
    28,470.92/39,290.07 = 15,723.74/x
  3. Step 3: Cross multiply
    28,470.92x = 39,290.07 × 15,723.74
  4. Step 4: Simplify right side
    28,470.92x = 617,786,845.26
  5. Step 5: Solve for x
    x = 617,786,845.26/28,470.92
  6. Step 6: Final answer
    x = 21,698.87

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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.