Home / 28,989.12-40,004.88-15,741.12

Finding the Fourth Proportional to 28,989.12, 40,004.88 and 15,741.12

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Solution

The fourth proportional to 28,989.12, 40,004.88 and 15,741.12 is: 21,722.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,989.12 : 40,004.88 = 15,741.12 : x
  2. Step 2: Convert to fraction form
    28,989.12/40,004.88 = 15,741.12/x
  3. Step 3: Cross multiply
    28,989.12x = 40,004.88 × 15,741.12
  4. Step 4: Simplify right side
    28,989.12x = 629,721,616.67
  5. Step 5: Solve for x
    x = 629,721,616.67/28,989.12
  6. Step 6: Final answer
    x = 21,722.69

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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.