Home / 20,530.20-30,805.02-11,772.52

Finding the Fourth Proportional to 20,530.20, 30,805.02 and 11,772.52

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Solution

The fourth proportional to 20,530.20, 30,805.02 and 11,772.52 is: 17,664.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,530.20 : 30,805.02 = 11,772.52 : x
  2. Step 2: Convert to fraction form
    20,530.20/30,805.02 = 11,772.52/x
  3. Step 3: Cross multiply
    20,530.20x = 30,805.02 × 11,772.52
  4. Step 4: Simplify right side
    20,530.20x = 362,652,714.05
  5. Step 5: Solve for x
    x = 362,652,714.05/20,530.20
  6. Step 6: Final answer
    x = 17,664.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.