Home / 13,691.56-20,438.30-12,030.81

Finding the Fourth Proportional to 13,691.56, 20,438.30 and 12,030.81

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Solution

The fourth proportional to 13,691.56, 20,438.30 and 12,030.81 is: 17,959.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,691.56 : 20,438.30 = 12,030.81 : x
  2. Step 2: Convert to fraction form
    13,691.56/20,438.30 = 12,030.81/x
  3. Step 3: Cross multiply
    13,691.56x = 20,438.30 × 12,030.81
  4. Step 4: Simplify right side
    13,691.56x = 245,889,288.98
  5. Step 5: Solve for x
    x = 245,889,288.98/13,691.56
  6. Step 6: Final answer
    x = 17,959.19

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.