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Finding the Fourth Proportional to 11,563.92, 15,942.29 and 7,312.86

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Solution

The fourth proportional to 11,563.92, 15,942.29 and 7,312.86 is: 10,081.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,563.92 : 15,942.29 = 7,312.86 : x
  2. Step 2: Convert to fraction form
    11,563.92/15,942.29 = 7,312.86/x
  3. Step 3: Cross multiply
    11,563.92x = 15,942.29 × 7,312.86
  4. Step 4: Simplify right side
    11,563.92x = 116,583,698.29
  5. Step 5: Solve for x
    x = 116,583,698.29/11,563.92
  6. Step 6: Final answer
    x = 10,081.68

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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.