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Finding the Fourth Proportional to 15,141.76, 20,895.36 and 8,767.92

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Solution

The fourth proportional to 15,141.76, 20,895.36 and 8,767.92 is: 12,099.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,141.76 : 20,895.36 = 8,767.92 : x
  2. Step 2: Convert to fraction form
    15,141.76/20,895.36 = 8,767.92/x
  3. Step 3: Cross multiply
    15,141.76x = 20,895.36 × 8,767.92
  4. Step 4: Simplify right side
    15,141.76x = 183,208,844.85
  5. Step 5: Solve for x
    x = 183,208,844.85/15,141.76
  6. Step 6: Final answer
    x = 12,099.57

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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.