Home / 21,092.91-31,623.47-12,770.92

Finding the Fourth Proportional to 21,092.91, 31,623.47 and 12,770.92

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Solution

The fourth proportional to 21,092.91, 31,623.47 and 12,770.92 is: 19,146.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,092.91 : 31,623.47 = 12,770.92 : x
  2. Step 2: Convert to fraction form
    21,092.91/31,623.47 = 12,770.92/x
  3. Step 3: Cross multiply
    21,092.91x = 31,623.47 × 12,770.92
  4. Step 4: Simplify right side
    21,092.91x = 403,860,805.49
  5. Step 5: Solve for x
    x = 403,860,805.49/21,092.91
  6. Step 6: Final answer
    x = 19,146.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.