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Finding the Fourth Proportional to 20,959.99, 28,910.13 and 14,233.93

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Solution

The fourth proportional to 20,959.99, 28,910.13 and 14,233.93 is: 19,632.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,959.99 : 28,910.13 = 14,233.93 : x
  2. Step 2: Convert to fraction form
    20,959.99/28,910.13 = 14,233.93/x
  3. Step 3: Cross multiply
    20,959.99x = 28,910.13 × 14,233.93
  4. Step 4: Simplify right side
    20,959.99x = 411,504,641.06
  5. Step 5: Solve for x
    x = 411,504,641.06/20,959.99
  6. Step 6: Final answer
    x = 19,632.87

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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.