Home / 20,936.02-28,898.64-13,771.20

Finding the Fourth Proportional to 20,936.02, 28,898.64 and 13,771.20

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Solution

The fourth proportional to 20,936.02, 28,898.64 and 13,771.20 is: 19,008.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,936.02 : 28,898.64 = 13,771.20 : x
  2. Step 2: Convert to fraction form
    20,936.02/28,898.64 = 13,771.20/x
  3. Step 3: Cross multiply
    20,936.02x = 28,898.64 × 13,771.20
  4. Step 4: Simplify right side
    20,936.02x = 397,968,951.17
  5. Step 5: Solve for x
    x = 397,968,951.17/20,936.02
  6. Step 6: Final answer
    x = 19,008.82

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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.