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Finding the Fourth Proportional to 15,864.66, 21,894.03 and 8,790.93

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Solution

The fourth proportional to 15,864.66, 21,894.03 and 8,790.93 is: 12,131.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,864.66 : 21,894.03 = 8,790.93 : x
  2. Step 2: Convert to fraction form
    15,864.66/21,894.03 = 8,790.93/x
  3. Step 3: Cross multiply
    15,864.66x = 21,894.03 × 8,790.93
  4. Step 4: Simplify right side
    15,864.66x = 192,468,885.15
  5. Step 5: Solve for x
    x = 192,468,885.15/15,864.66
  6. Step 6: Final answer
    x = 12,131.93

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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.