Home / 20,857.79-28,787.76-16,311.47

Finding the Fourth Proportional to 20,857.79, 28,787.76 and 16,311.47

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Solution

The fourth proportional to 20,857.79, 28,787.76 and 16,311.47 is: 22,512.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,857.79 : 28,787.76 = 16,311.47 : x
  2. Step 2: Convert to fraction form
    20,857.79/28,787.76 = 16,311.47/x
  3. Step 3: Cross multiply
    20,857.79x = 28,787.76 × 16,311.47
  4. Step 4: Simplify right side
    20,857.79x = 469,570,458.11
  5. Step 5: Solve for x
    x = 469,570,458.11/20,857.79
  6. Step 6: Final answer
    x = 22,512.95

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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.