Home / 21,653.13-29,881.79-12,221.76

Finding the Fourth Proportional to 21,653.13, 29,881.79 and 12,221.76

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Solution

The fourth proportional to 21,653.13, 29,881.79 and 12,221.76 is: 16,866.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,653.13 : 29,881.79 = 12,221.76 : x
  2. Step 2: Convert to fraction form
    21,653.13/29,881.79 = 12,221.76/x
  3. Step 3: Cross multiply
    21,653.13x = 29,881.79 × 12,221.76
  4. Step 4: Simplify right side
    21,653.13x = 365,207,855.23
  5. Step 5: Solve for x
    x = 365,207,855.23/21,653.13
  6. Step 6: Final answer
    x = 16,866.29

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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.