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Finding the Fourth Proportional to 9,321.99, 12,864.87 and 5,343.77

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Solution

The fourth proportional to 9,321.99, 12,864.87 and 5,343.77 is: 7,374.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,321.99 : 12,864.87 = 5,343.77 : x
  2. Step 2: Convert to fraction form
    9,321.99/12,864.87 = 5,343.77/x
  3. Step 3: Cross multiply
    9,321.99x = 12,864.87 × 5,343.77
  4. Step 4: Simplify right side
    9,321.99x = 68,746,842.04
  5. Step 5: Solve for x
    x = 68,746,842.04/9,321.99
  6. Step 6: Final answer
    x = 7,374.70

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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.