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Finding the Fourth Proportional to 10,313.80, 15,486.90 and 5,939.80

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Solution

The fourth proportional to 10,313.80, 15,486.90 and 5,939.80 is: 8,919.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,313.80 : 15,486.90 = 5,939.80 : x
  2. Step 2: Convert to fraction form
    10,313.80/15,486.90 = 5,939.80/x
  3. Step 3: Cross multiply
    10,313.80x = 15,486.90 × 5,939.80
  4. Step 4: Simplify right side
    10,313.80x = 91,989,088.62
  5. Step 5: Solve for x
    x = 91,989,088.62/10,313.80
  6. Step 6: Final answer
    x = 8,919.03

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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.