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Finding the Fourth Proportional to 8,653.40, 12,980.30 and 3,107.12

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Solution

The fourth proportional to 8,653.40, 12,980.30 and 3,107.12 is: 4,660.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,653.40 : 12,980.30 = 3,107.12 : x
  2. Step 2: Convert to fraction form
    8,653.40/12,980.30 = 3,107.12/x
  3. Step 3: Cross multiply
    8,653.40x = 12,980.30 × 3,107.12
  4. Step 4: Simplify right side
    8,653.40x = 40,331,349.74
  5. Step 5: Solve for x
    x = 40,331,349.74/8,653.40
  6. Step 6: Final answer
    x = 4,660.75

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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.