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Finding the Fourth Proportional to 9,358.49, 12,919.97 and 6,491.40

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Solution

The fourth proportional to 9,358.49, 12,919.97 and 6,491.40 is: 8,961.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,358.49 : 12,919.97 = 6,491.40 : x
  2. Step 2: Convert to fraction form
    9,358.49/12,919.97 = 6,491.40/x
  3. Step 3: Cross multiply
    9,358.49x = 12,919.97 × 6,491.40
  4. Step 4: Simplify right side
    9,358.49x = 83,868,661.04
  5. Step 5: Solve for x
    x = 83,868,661.04/9,358.49
  6. Step 6: Final answer
    x = 8,961.77

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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.