Home / 20,651.78-28,500.27-12,153.98

Finding the Fourth Proportional to 20,651.78, 28,500.27 and 12,153.98

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Solution

The fourth proportional to 20,651.78, 28,500.27 and 12,153.98 is: 16,772.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,651.78 : 28,500.27 = 12,153.98 : x
  2. Step 2: Convert to fraction form
    20,651.78/28,500.27 = 12,153.98/x
  3. Step 3: Cross multiply
    20,651.78x = 28,500.27 × 12,153.98
  4. Step 4: Simplify right side
    20,651.78x = 346,391,711.57
  5. Step 5: Solve for x
    x = 346,391,711.57/20,651.78
  6. Step 6: Final answer
    x = 16,772.97

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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.