Home / 20,505.88-28,298.21-11,553.52

Finding the Fourth Proportional to 20,505.88, 28,298.21 and 11,553.52

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Solution

The fourth proportional to 20,505.88, 28,298.21 and 11,553.52 is: 15,943.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,505.88 : 28,298.21 = 11,553.52 : x
  2. Step 2: Convert to fraction form
    20,505.88/28,298.21 = 11,553.52/x
  3. Step 3: Cross multiply
    20,505.88x = 28,298.21 × 11,553.52
  4. Step 4: Simplify right side
    20,505.88x = 326,943,877.43
  5. Step 5: Solve for x
    x = 326,943,877.43/20,505.88
  6. Step 6: Final answer
    x = 15,943.91

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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.