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Finding the Fourth Proportional to 6,690.43, 10,011.94 and 4,931.28

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Solution

The fourth proportional to 6,690.43, 10,011.94 and 4,931.28 is: 7,379.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,690.43 : 10,011.94 = 4,931.28 : x
  2. Step 2: Convert to fraction form
    6,690.43/10,011.94 = 4,931.28/x
  3. Step 3: Cross multiply
    6,690.43x = 10,011.94 × 4,931.28
  4. Step 4: Simplify right side
    6,690.43x = 49,371,667.16
  5. Step 5: Solve for x
    x = 49,371,667.16/6,690.43
  6. Step 6: Final answer
    x = 7,379.44

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.