Home / 20,730.24-31,099.80-6,691.06

Finding the Fourth Proportional to 20,730.24, 31,099.80 and 6,691.06

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Solution

The fourth proportional to 20,730.24, 31,099.80 and 6,691.06 is: 10,038.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,730.24 : 31,099.80 = 6,691.06 : x
  2. Step 2: Convert to fraction form
    20,730.24/31,099.80 = 6,691.06/x
  3. Step 3: Cross multiply
    20,730.24x = 31,099.80 × 6,691.06
  4. Step 4: Simplify right side
    20,730.24x = 208,090,627.79
  5. Step 5: Solve for x
    x = 208,090,627.79/20,730.24
  6. Step 6: Final answer
    x = 10,038.02

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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.