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Finding the Fourth Proportional to 15,018.92, 20,726.54 and 8,213.34

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Solution

The fourth proportional to 15,018.92, 20,726.54 and 8,213.34 is: 11,334.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,018.92 : 20,726.54 = 8,213.34 : x
  2. Step 2: Convert to fraction form
    15,018.92/20,726.54 = 8,213.34/x
  3. Step 3: Cross multiply
    15,018.92x = 20,726.54 × 8,213.34
  4. Step 4: Simplify right side
    15,018.92x = 170,234,117.11
  5. Step 5: Solve for x
    x = 170,234,117.11/15,018.92
  6. Step 6: Final answer
    x = 11,334.65

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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.