Home / 20,869.02-28,801.62-11,917.80

Finding the Fourth Proportional to 20,869.02, 28,801.62 and 11,917.80

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Solution

The fourth proportional to 20,869.02, 28,801.62 and 11,917.80 is: 16,447.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,869.02 : 28,801.62 = 11,917.80 : x
  2. Step 2: Convert to fraction form
    20,869.02/28,801.62 = 11,917.80/x
  3. Step 3: Cross multiply
    20,869.02x = 28,801.62 × 11,917.80
  4. Step 4: Simplify right side
    20,869.02x = 343,251,946.84
  5. Step 5: Solve for x
    x = 343,251,946.84/20,869.02
  6. Step 6: Final answer
    x = 16,447.92

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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.