Home / 20,940.12-28,897.47-11,380.08

Finding the Fourth Proportional to 20,940.12, 28,897.47 and 11,380.08

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Solution

The fourth proportional to 20,940.12, 28,897.47 and 11,380.08 is: 15,704.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,940.12 : 28,897.47 = 11,380.08 : x
  2. Step 2: Convert to fraction form
    20,940.12/28,897.47 = 11,380.08/x
  3. Step 3: Cross multiply
    20,940.12x = 28,897.47 × 11,380.08
  4. Step 4: Simplify right side
    20,940.12x = 328,855,520.40
  5. Step 5: Solve for x
    x = 328,855,520.40/20,940.12
  6. Step 6: Final answer
    x = 15,704.57

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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.