Home / 20,782.62-28,680.48-12,397.50

Finding the Fourth Proportional to 20,782.62, 28,680.48 and 12,397.50

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Solution

The fourth proportional to 20,782.62, 28,680.48 and 12,397.50 is: 17,108.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,782.62 : 28,680.48 = 12,397.50 : x
  2. Step 2: Convert to fraction form
    20,782.62/28,680.48 = 12,397.50/x
  3. Step 3: Cross multiply
    20,782.62x = 28,680.48 × 12,397.50
  4. Step 4: Simplify right side
    20,782.62x = 355,566,250.80
  5. Step 5: Solve for x
    x = 355,566,250.80/20,782.62
  6. Step 6: Final answer
    x = 17,108.83

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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.