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Finding the Fourth Proportional to 8,649.80, 12,974.08 and 4,940.40

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Solution

The fourth proportional to 8,649.80, 12,974.08 and 4,940.40 is: 7,410.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,649.80 : 12,974.08 = 4,940.40 : x
  2. Step 2: Convert to fraction form
    8,649.80/12,974.08 = 4,940.40/x
  3. Step 3: Cross multiply
    8,649.80x = 12,974.08 × 4,940.40
  4. Step 4: Simplify right side
    8,649.80x = 64,097,144.83
  5. Step 5: Solve for x
    x = 64,097,144.83/8,649.80
  6. Step 6: Final answer
    x = 7,410.25

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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.