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Finding the Fourth Proportional to 8,947.36, 12,358.98 and 6,809.90

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Solution

The fourth proportional to 8,947.36, 12,358.98 and 6,809.90 is: 9,406.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,947.36 : 12,358.98 = 6,809.90 : x
  2. Step 2: Convert to fraction form
    8,947.36/12,358.98 = 6,809.90/x
  3. Step 3: Cross multiply
    8,947.36x = 12,358.98 × 6,809.90
  4. Step 4: Simplify right side
    8,947.36x = 84,163,448.80
  5. Step 5: Solve for x
    x = 84,163,448.80/8,947.36
  6. Step 6: Final answer
    x = 9,406.51

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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.