Home / 28,720.36-43,080.60-7,943.92

Finding the Fourth Proportional to 28,720.36, 43,080.60 and 7,943.92

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Solution

The fourth proportional to 28,720.36, 43,080.60 and 7,943.92 is: 11,915.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,720.36 : 43,080.60 = 7,943.92 : x
  2. Step 2: Convert to fraction form
    28,720.36/43,080.60 = 7,943.92/x
  3. Step 3: Cross multiply
    28,720.36x = 43,080.60 × 7,943.92
  4. Step 4: Simplify right side
    28,720.36x = 342,228,839.95
  5. Step 5: Solve for x
    x = 342,228,839.95/28,720.36
  6. Step 6: Final answer
    x = 11,915.90

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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.