Home / 20,380.02-28,125.14-11,887.58

Finding the Fourth Proportional to 20,380.02, 28,125.14 and 11,887.58

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Solution

The fourth proportional to 20,380.02, 28,125.14 and 11,887.58 is: 16,405.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,380.02 : 28,125.14 = 11,887.58 : x
  2. Step 2: Convert to fraction form
    20,380.02/28,125.14 = 11,887.58/x
  3. Step 3: Cross multiply
    20,380.02x = 28,125.14 × 11,887.58
  4. Step 4: Simplify right side
    20,380.02x = 334,339,651.70
  5. Step 5: Solve for x
    x = 334,339,651.70/20,380.02
  6. Step 6: Final answer
    x = 16,405.27

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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.