Home / 21,162.27-29,190.65-13,618.40

Finding the Fourth Proportional to 21,162.27, 29,190.65 and 13,618.40

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Solution

The fourth proportional to 21,162.27, 29,190.65 and 13,618.40 is: 18,784.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,162.27 : 29,190.65 = 13,618.40 : x
  2. Step 2: Convert to fraction form
    21,162.27/29,190.65 = 13,618.40/x
  3. Step 3: Cross multiply
    21,162.27x = 29,190.65 × 13,618.40
  4. Step 4: Simplify right side
    21,162.27x = 397,529,733.91
  5. Step 5: Solve for x
    x = 397,529,733.91/21,162.27
  6. Step 6: Final answer
    x = 18,784.83

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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.