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Finding the Fourth Proportional to 15,227.91, 20,990.70 and 14,005.98

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Solution

The fourth proportional to 15,227.91, 20,990.70 and 14,005.98 is: 19,306.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,227.91 : 20,990.70 = 14,005.98 : x
  2. Step 2: Convert to fraction form
    15,227.91/20,990.70 = 14,005.98/x
  3. Step 3: Cross multiply
    15,227.91x = 20,990.70 × 14,005.98
  4. Step 4: Simplify right side
    15,227.91x = 293,995,324.39
  5. Step 5: Solve for x
    x = 293,995,324.39/15,227.91
  6. Step 6: Final answer
    x = 19,306.35

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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.