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Finding the Fourth Proportional to 13,663.99, 20,523.30 and 13,215.61

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Solution

The fourth proportional to 13,663.99, 20,523.30 and 13,215.61 is: 19,849.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,663.99 : 20,523.30 = 13,215.61 : x
  2. Step 2: Convert to fraction form
    13,663.99/20,523.30 = 13,215.61/x
  3. Step 3: Cross multiply
    13,663.99x = 20,523.30 × 13,215.61
  4. Step 4: Simplify right side
    13,663.99x = 271,227,928.71
  5. Step 5: Solve for x
    x = 271,227,928.71/13,663.99
  6. Step 6: Final answer
    x = 19,849.83

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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.