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Finding the Fourth Proportional to 15,894.11, 21,933.91 and 8,724.08

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Solution

The fourth proportional to 15,894.11, 21,933.91 and 8,724.08 is: 12,039.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,894.11 : 21,933.91 = 8,724.08 : x
  2. Step 2: Convert to fraction form
    15,894.11/21,933.91 = 8,724.08/x
  3. Step 3: Cross multiply
    15,894.11x = 21,933.91 × 8,724.08
  4. Step 4: Simplify right side
    15,894.11x = 191,353,185.55
  5. Step 5: Solve for x
    x = 191,353,185.55/15,894.11
  6. Step 6: Final answer
    x = 12,039.25

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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.