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Finding the Fourth Proportional to 11,358.72, 15,678.72 and 7,633.92

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Solution

The fourth proportional to 11,358.72, 15,678.72 and 7,633.92 is: 10,537.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,358.72 : 15,678.72 = 7,633.92 : x
  2. Step 2: Convert to fraction form
    11,358.72/15,678.72 = 7,633.92/x
  3. Step 3: Cross multiply
    11,358.72x = 15,678.72 × 7,633.92
  4. Step 4: Simplify right side
    11,358.72x = 119,690,094.18
  5. Step 5: Solve for x
    x = 119,690,094.18/11,358.72
  6. Step 6: Final answer
    x = 10,537.29

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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.