Home / 20,740.43-28,621.79-11,787.70

Finding the Fourth Proportional to 20,740.43, 28,621.79 and 11,787.70

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Solution

The fourth proportional to 20,740.43, 28,621.79 and 11,787.70 is: 16,267.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,740.43 : 28,621.79 = 11,787.70 : x
  2. Step 2: Convert to fraction form
    20,740.43/28,621.79 = 11,787.70/x
  3. Step 3: Cross multiply
    20,740.43x = 28,621.79 × 11,787.70
  4. Step 4: Simplify right side
    20,740.43x = 337,385,031.90
  5. Step 5: Solve for x
    x = 337,385,031.90/20,740.43
  6. Step 6: Final answer
    x = 16,267.03

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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.