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Finding the Fourth Proportional to 12,346.79, 18,515.79 and 4,447.18

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Solution

The fourth proportional to 12,346.79, 18,515.79 and 4,447.18 is: 6,669.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,346.79 : 18,515.79 = 4,447.18 : x
  2. Step 2: Convert to fraction form
    12,346.79/18,515.79 = 4,447.18/x
  3. Step 3: Cross multiply
    12,346.79x = 18,515.79 × 4,447.18
  4. Step 4: Simplify right side
    12,346.79x = 82,343,004.68
  5. Step 5: Solve for x
    x = 82,343,004.68/12,346.79
  6. Step 6: Final answer
    x = 6,669.19

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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.