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Finding the Fourth Proportional to 12,432.63, 18,617.13 and 6,879.81

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Solution

The fourth proportional to 12,432.63, 18,617.13 and 6,879.81 is: 10,302.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,432.63 : 18,617.13 = 6,879.81 : x
  2. Step 2: Convert to fraction form
    12,432.63/18,617.13 = 6,879.81/x
  3. Step 3: Cross multiply
    12,432.63x = 18,617.13 × 6,879.81
  4. Step 4: Simplify right side
    12,432.63x = 128,082,317.15
  5. Step 5: Solve for x
    x = 128,082,317.15/12,432.63
  6. Step 6: Final answer
    x = 10,302.11

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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.