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Finding the Fourth Proportional to 15,351.87, 21,185.48 and 8,727.87

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Solution

The fourth proportional to 15,351.87, 21,185.48 and 8,727.87 is: 12,044.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,351.87 : 21,185.48 = 8,727.87 : x
  2. Step 2: Convert to fraction form
    15,351.87/21,185.48 = 8,727.87/x
  3. Step 3: Cross multiply
    15,351.87x = 21,185.48 × 8,727.87
  4. Step 4: Simplify right side
    15,351.87x = 184,904,071.69
  5. Step 5: Solve for x
    x = 184,904,071.69/15,351.87
  6. Step 6: Final answer
    x = 12,044.40

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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.