Home / 21,230.52-29,311.38-13,680.60

Finding the Fourth Proportional to 21,230.52, 29,311.38 and 13,680.60

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Solution

The fourth proportional to 21,230.52, 29,311.38 and 13,680.60 is: 18,887.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,230.52 : 29,311.38 = 13,680.60 : x
  2. Step 2: Convert to fraction form
    21,230.52/29,311.38 = 13,680.60/x
  3. Step 3: Cross multiply
    21,230.52x = 29,311.38 × 13,680.60
  4. Step 4: Simplify right side
    21,230.52x = 400,997,265.23
  5. Step 5: Solve for x
    x = 400,997,265.23/21,230.52
  6. Step 6: Final answer
    x = 18,887.77

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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.