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Finding the Fourth Proportional to 9,293.84, 12,821.85 and 5,312.82

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Solution

The fourth proportional to 9,293.84, 12,821.85 and 5,312.82 is: 7,329.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,293.84 : 12,821.85 = 5,312.82 : x
  2. Step 2: Convert to fraction form
    9,293.84/12,821.85 = 5,312.82/x
  3. Step 3: Cross multiply
    9,293.84x = 12,821.85 × 5,312.82
  4. Step 4: Simplify right side
    9,293.84x = 68,120,181.12
  5. Step 5: Solve for x
    x = 68,120,181.12/9,293.84
  6. Step 6: Final answer
    x = 7,329.61

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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.