Home / 28,551.96-39,400.72-15,805.70

Finding the Fourth Proportional to 28,551.96, 39,400.72 and 15,805.70

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Solution

The fourth proportional to 28,551.96, 39,400.72 and 15,805.70 is: 21,811.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,551.96 : 39,400.72 = 15,805.70 : x
  2. Step 2: Convert to fraction form
    28,551.96/39,400.72 = 15,805.70/x
  3. Step 3: Cross multiply
    28,551.96x = 39,400.72 × 15,805.70
  4. Step 4: Simplify right side
    28,551.96x = 622,755,960.10
  5. Step 5: Solve for x
    x = 622,755,960.10/28,551.96
  6. Step 6: Final answer
    x = 21,811.32

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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.