Home / 21,197.10-29,247.75-13,631.58

Finding the Fourth Proportional to 21,197.10, 29,247.75 and 13,631.58

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Solution

The fourth proportional to 21,197.10, 29,247.75 and 13,631.58 is: 18,808.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,197.10 : 29,247.75 = 13,631.58 : x
  2. Step 2: Convert to fraction form
    21,197.10/29,247.75 = 13,631.58/x
  3. Step 3: Cross multiply
    21,197.10x = 29,247.75 × 13,631.58
  4. Step 4: Simplify right side
    21,197.10x = 398,693,043.95
  5. Step 5: Solve for x
    x = 398,693,043.95/21,197.10
  6. Step 6: Final answer
    x = 18,808.85

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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.