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Finding the Fourth Proportional to 7,108.46, 9,813.63 and 4,990.49

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Solution

The fourth proportional to 7,108.46, 9,813.63 and 4,990.49 is: 6,889.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,108.46 : 9,813.63 = 4,990.49 : x
  2. Step 2: Convert to fraction form
    7,108.46/9,813.63 = 4,990.49/x
  3. Step 3: Cross multiply
    7,108.46x = 9,813.63 × 4,990.49
  4. Step 4: Simplify right side
    7,108.46x = 48,974,773.31
  5. Step 5: Solve for x
    x = 48,974,773.31/7,108.46
  6. Step 6: Final answer
    x = 6,889.65

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Double scale
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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.