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Finding the Fourth Proportional to 9,805.85, 13,532.16 and 5,329.61

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Solution

The fourth proportional to 9,805.85, 13,532.16 and 5,329.61 is: 7,354.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,805.85 : 13,532.16 = 5,329.61 : x
  2. Step 2: Convert to fraction form
    9,805.85/13,532.16 = 5,329.61/x
  3. Step 3: Cross multiply
    9,805.85x = 13,532.16 × 5,329.61
  4. Step 4: Simplify right side
    9,805.85x = 72,121,153.71
  5. Step 5: Solve for x
    x = 72,121,153.71/9,805.85
  6. Step 6: Final answer
    x = 7,354.91

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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.