Home / 20,385.27-28,133.17-12,320.94

Finding the Fourth Proportional to 20,385.27, 28,133.17 and 12,320.94

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Solution

The fourth proportional to 20,385.27, 28,133.17 and 12,320.94 is: 17,003.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,385.27 : 28,133.17 = 12,320.94 : x
  2. Step 2: Convert to fraction form
    20,385.27/28,133.17 = 12,320.94/x
  3. Step 3: Cross multiply
    20,385.27x = 28,133.17 × 12,320.94
  4. Step 4: Simplify right side
    20,385.27x = 346,627,006.21
  5. Step 5: Solve for x
    x = 346,627,006.21/20,385.27
  6. Step 6: Final answer
    x = 17,003.80

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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.