Home / 21,207.70-29,253.20-13,663.92

Finding the Fourth Proportional to 21,207.70, 29,253.20 and 13,663.92

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Solution

The fourth proportional to 21,207.70, 29,253.20 and 13,663.92 is: 18,847.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,207.70 : 29,253.20 = 13,663.92 : x
  2. Step 2: Convert to fraction form
    21,207.70/29,253.20 = 13,663.92/x
  3. Step 3: Cross multiply
    21,207.70x = 29,253.20 × 13,663.92
  4. Step 4: Simplify right side
    21,207.70x = 399,713,384.54
  5. Step 5: Solve for x
    x = 399,713,384.54/21,207.70
  6. Step 6: Final answer
    x = 18,847.56

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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.