Home / 20,666.52-28,519.98-11,235.09

Finding the Fourth Proportional to 20,666.52, 28,519.98 and 11,235.09

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Solution

The fourth proportional to 20,666.52, 28,519.98 and 11,235.09 is: 15,504.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,666.52 : 28,519.98 = 11,235.09 : x
  2. Step 2: Convert to fraction form
    20,666.52/28,519.98 = 11,235.09/x
  3. Step 3: Cross multiply
    20,666.52x = 28,519.98 × 11,235.09
  4. Step 4: Simplify right side
    20,666.52x = 320,424,542.10
  5. Step 5: Solve for x
    x = 320,424,542.10/20,666.52
  6. Step 6: Final answer
    x = 15,504.52

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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.