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Finding the Fourth Proportional to 8,260.40, 12,383.40 and 4,974.80

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Solution

The fourth proportional to 8,260.40, 12,383.40 and 4,974.80 is: 7,457.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,260.40 : 12,383.40 = 4,974.80 : x
  2. Step 2: Convert to fraction form
    8,260.40/12,383.40 = 4,974.80/x
  3. Step 3: Cross multiply
    8,260.40x = 12,383.40 × 4,974.80
  4. Step 4: Simplify right side
    8,260.40x = 61,604,938.32
  5. Step 5: Solve for x
    x = 61,604,938.32/8,260.40
  6. Step 6: Final answer
    x = 7,457.86

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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.