Home / 21,155.85-29,194.02-11,724.21

Finding the Fourth Proportional to 21,155.85, 29,194.02 and 11,724.21

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Solution

The fourth proportional to 21,155.85, 29,194.02 and 11,724.21 is: 16,178.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,155.85 : 29,194.02 = 11,724.21 : x
  2. Step 2: Convert to fraction form
    21,155.85/29,194.02 = 11,724.21/x
  3. Step 3: Cross multiply
    21,155.85x = 29,194.02 × 11,724.21
  4. Step 4: Simplify right side
    21,155.85x = 342,276,821.22
  5. Step 5: Solve for x
    x = 342,276,821.22/21,155.85
  6. Step 6: Final answer
    x = 16,178.83

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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.