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Finding the Fourth Proportional to 6,979.72, 9,616.50 and 4,491.40

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Solution

The fourth proportional to 6,979.72, 9,616.50 and 4,491.40 is: 6,188.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,979.72 : 9,616.50 = 4,491.40 : x
  2. Step 2: Convert to fraction form
    6,979.72/9,616.50 = 4,491.40/x
  3. Step 3: Cross multiply
    6,979.72x = 9,616.50 × 4,491.40
  4. Step 4: Simplify right side
    6,979.72x = 43,191,548.10
  5. Step 5: Solve for x
    x = 43,191,548.10/6,979.72
  6. Step 6: Final answer
    x = 6,188.15

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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.