Home / 15,378.24-21,221.92-8,663.88

Finding the Fourth Proportional to 15,378.24, 21,221.92 and 8,663.88

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Solution

The fourth proportional to 15,378.24, 21,221.92 and 8,663.88 is: 11,956.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,378.24 : 21,221.92 = 8,663.88 : x
  2. Step 2: Convert to fraction form
    15,378.24/21,221.92 = 8,663.88/x
  3. Step 3: Cross multiply
    15,378.24x = 21,221.92 × 8,663.88
  4. Step 4: Simplify right side
    15,378.24x = 183,864,168.25
  5. Step 5: Solve for x
    x = 183,864,168.25/15,378.24
  6. Step 6: Final answer
    x = 11,956.13

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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.