Home / 20,447.02-28,213.68-12,489.58

Finding the Fourth Proportional to 20,447.02, 28,213.68 and 12,489.58

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Solution

The fourth proportional to 20,447.02, 28,213.68 and 12,489.58 is: 17,233.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,447.02 : 28,213.68 = 12,489.58 : x
  2. Step 2: Convert to fraction form
    20,447.02/28,213.68 = 12,489.58/x
  3. Step 3: Cross multiply
    20,447.02x = 28,213.68 × 12,489.58
  4. Step 4: Simplify right side
    20,447.02x = 352,377,013.45
  5. Step 5: Solve for x
    x = 352,377,013.45/20,447.02
  6. Step 6: Final answer
    x = 17,233.66

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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.