Home / 28,781.20-43,155.42-13,986.16

Finding the Fourth Proportional to 28,781.20, 43,155.42 and 13,986.16

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Solution

The fourth proportional to 28,781.20, 43,155.42 and 13,986.16 is: 20,971.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,781.20 : 43,155.42 = 13,986.16 : x
  2. Step 2: Convert to fraction form
    28,781.20/43,155.42 = 13,986.16/x
  3. Step 3: Cross multiply
    28,781.20x = 43,155.42 × 13,986.16
  4. Step 4: Simplify right side
    28,781.20x = 603,578,608.99
  5. Step 5: Solve for x
    x = 603,578,608.99/28,781.20
  6. Step 6: Final answer
    x = 20,971.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.