Home / 20,887.02-28,821.42-11,935.10

Finding the Fourth Proportional to 20,887.02, 28,821.42 and 11,935.10

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Solution

The fourth proportional to 20,887.02, 28,821.42 and 11,935.10 is: 16,468.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,887.02 : 28,821.42 = 11,935.10 : x
  2. Step 2: Convert to fraction form
    20,887.02/28,821.42 = 11,935.10/x
  3. Step 3: Cross multiply
    20,887.02x = 28,821.42 × 11,935.10
  4. Step 4: Simplify right side
    20,887.02x = 343,986,601.90
  5. Step 5: Solve for x
    x = 343,986,601.90/20,887.02
  6. Step 6: Final answer
    x = 16,468.92

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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.