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Finding the Fourth Proportional to 10,805.76, 16,218.90 and 5,262.12

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Solution

The fourth proportional to 10,805.76, 16,218.90 and 5,262.12 is: 7,898.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,805.76 : 16,218.90 = 5,262.12 : x
  2. Step 2: Convert to fraction form
    10,805.76/16,218.90 = 5,262.12/x
  3. Step 3: Cross multiply
    10,805.76x = 16,218.90 × 5,262.12
  4. Step 4: Simplify right side
    10,805.76x = 85,345,798.07
  5. Step 5: Solve for x
    x = 85,345,798.07/10,805.76
  6. Step 6: Final answer
    x = 7,898.18

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1.5x scale

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.