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Finding the Fourth Proportional to 8,980.64, 12,393.16 and 4,947.39

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Solution

The fourth proportional to 8,980.64, 12,393.16 and 4,947.39 is: 6,827.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,980.64 : 12,393.16 = 4,947.39 : x
  2. Step 2: Convert to fraction form
    8,980.64/12,393.16 = 4,947.39/x
  3. Step 3: Cross multiply
    8,980.64x = 12,393.16 × 4,947.39
  4. Step 4: Simplify right side
    8,980.64x = 61,313,795.85
  5. Step 5: Solve for x
    x = 61,313,795.85/8,980.64
  6. Step 6: Final answer
    x = 6,827.33

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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.