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Finding the Fourth Proportional to 12,313.75, 18,470.76 and 3,079.75

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Solution

The fourth proportional to 12,313.75, 18,470.76 and 3,079.75 is: 4,619.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,313.75 : 18,470.76 = 3,079.75 : x
  2. Step 2: Convert to fraction form
    12,313.75/18,470.76 = 3,079.75/x
  3. Step 3: Cross multiply
    12,313.75x = 18,470.76 × 3,079.75
  4. Step 4: Simplify right side
    12,313.75x = 56,885,323.11
  5. Step 5: Solve for x
    x = 56,885,323.11/12,313.75
  6. Step 6: Final answer
    x = 4,619.66

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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.