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Finding the Fourth Proportional to 15,091.93, 20,823.54 and 8,717.17

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Solution

The fourth proportional to 15,091.93, 20,823.54 and 8,717.17 is: 12,027.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,091.93 : 20,823.54 = 8,717.17 : x
  2. Step 2: Convert to fraction form
    15,091.93/20,823.54 = 8,717.17/x
  3. Step 3: Cross multiply
    15,091.93x = 20,823.54 × 8,717.17
  4. Step 4: Simplify right side
    15,091.93x = 181,522,338.18
  5. Step 5: Solve for x
    x = 181,522,338.18/15,091.93
  6. Step 6: Final answer
    x = 12,027.77

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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.