Home / 28,721.45-43,099.03-12,080.21

Finding the Fourth Proportional to 28,721.45, 43,099.03 and 12,080.21

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Solution

The fourth proportional to 28,721.45, 43,099.03 and 12,080.21 is: 18,127.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,721.45 : 43,099.03 = 12,080.21 : x
  2. Step 2: Convert to fraction form
    28,721.45/43,099.03 = 12,080.21/x
  3. Step 3: Cross multiply
    28,721.45x = 43,099.03 × 12,080.21
  4. Step 4: Simplify right side
    28,721.45x = 520,645,132.80
  5. Step 5: Solve for x
    x = 520,645,132.80/28,721.45
  6. Step 6: Final answer
    x = 18,127.40

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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.