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Finding the Fourth Proportional to 15,099.65, 20,838.20 and 8,727.05

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Solution

The fourth proportional to 15,099.65, 20,838.20 and 8,727.05 is: 12,043.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,099.65 : 20,838.20 = 8,727.05 : x
  2. Step 2: Convert to fraction form
    15,099.65/20,838.20 = 8,727.05/x
  3. Step 3: Cross multiply
    15,099.65x = 20,838.20 × 8,727.05
  4. Step 4: Simplify right side
    15,099.65x = 181,856,013.31
  5. Step 5: Solve for x
    x = 181,856,013.31/15,099.65
  6. Step 6: Final answer
    x = 12,043.72

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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.