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Finding the Fourth Proportional to 6,321.12, 9,483.12 and 1,939.20

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Solution

The fourth proportional to 6,321.12, 9,483.12 and 1,939.20 is: 2,909.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,321.12 : 9,483.12 = 1,939.20 : x
  2. Step 2: Convert to fraction form
    6,321.12/9,483.12 = 1,939.20/x
  3. Step 3: Cross multiply
    6,321.12x = 9,483.12 × 1,939.20
  4. Step 4: Simplify right side
    6,321.12x = 18,389,666.30
  5. Step 5: Solve for x
    x = 18,389,666.30/6,321.12
  6. Step 6: Final answer
    x = 2,909.24

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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.