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Finding the Fourth Proportional to 43,478.52, 65,215.53 and 12,313.86

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Solution

The fourth proportional to 43,478.52, 65,215.53 and 12,313.86 is: 18,470.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,478.52 : 65,215.53 = 12,313.86 : x
  2. Step 2: Convert to fraction form
    43,478.52/65,215.53 = 12,313.86/x
  3. Step 3: Cross multiply
    43,478.52x = 65,215.53 × 12,313.86
  4. Step 4: Simplify right side
    43,478.52x = 803,054,906.25
  5. Step 5: Solve for x
    x = 803,054,906.25/43,478.52
  6. Step 6: Final answer
    x = 18,470.15

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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.