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Finding the Fourth Proportional to 21,250, 29,324.40 and 11,818.88

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Solution

The fourth proportional to 21,250, 29,324.40 and 11,818.88 is: 16,309.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,250 : 29,324.40 = 11,818.88 : x
  2. Step 2: Convert to fraction form
    21,250/29,324.40 = 11,818.88/x
  3. Step 3: Cross multiply
    21,250x = 29,324.40 × 11,818.88
  4. Step 4: Simplify right side
    21,250x = 346,581,564.67
  5. Step 5: Solve for x
    x = 346,581,564.67/21,250
  6. Step 6: Final answer
    x = 16,309.72

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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.