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Finding the Fourth Proportional to 21,398.54, 32,088.07 and 8,911.11

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Solution

The fourth proportional to 21,398.54, 32,088.07 and 8,911.11 is: 13,362.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,398.54 : 32,088.07 = 8,911.11 : x
  2. Step 2: Convert to fraction form
    21,398.54/32,088.07 = 8,911.11/x
  3. Step 3: Cross multiply
    21,398.54x = 32,088.07 × 8,911.11
  4. Step 4: Simplify right side
    21,398.54x = 285,940,477.99
  5. Step 5: Solve for x
    x = 285,940,477.99/21,398.54
  6. Step 6: Final answer
    x = 13,362.61

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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.