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Finding the Fourth Proportional to 7,689.92, 10,605.12 and 5,036.36

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Solution

The fourth proportional to 7,689.92, 10,605.12 and 5,036.36 is: 6,945.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,689.92 : 10,605.12 = 5,036.36 : x
  2. Step 2: Convert to fraction form
    7,689.92/10,605.12 = 5,036.36/x
  3. Step 3: Cross multiply
    7,689.92x = 10,605.12 × 5,036.36
  4. Step 4: Simplify right side
    7,689.92x = 53,411,202.16
  5. Step 5: Solve for x
    x = 53,411,202.16/7,689.92
  6. Step 6: Final answer
    x = 6,945.61

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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.