Home / 12,489.40-18,729.06-4,693.96

Finding the Fourth Proportional to 12,489.40, 18,729.06 and 4,693.96

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Solution

The fourth proportional to 12,489.40, 18,729.06 and 4,693.96 is: 7,039.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,489.40 : 18,729.06 = 4,693.96 : x
  2. Step 2: Convert to fraction form
    12,489.40/18,729.06 = 4,693.96/x
  3. Step 3: Cross multiply
    12,489.40x = 18,729.06 × 4,693.96
  4. Step 4: Simplify right side
    12,489.40x = 87,913,458.48
  5. Step 5: Solve for x
    x = 87,913,458.48/12,489.40
  6. Step 6: Final answer
    x = 7,039.05

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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.