Home / 20,898.72-31,328.08-7,747.52

Finding the Fourth Proportional to 20,898.72, 31,328.08 and 7,747.52

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Solution

The fourth proportional to 20,898.72, 31,328.08 and 7,747.52 is: 11,613.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,898.72 : 31,328.08 = 7,747.52 : x
  2. Step 2: Convert to fraction form
    20,898.72/31,328.08 = 7,747.52/x
  3. Step 3: Cross multiply
    20,898.72x = 31,328.08 × 7,747.52
  4. Step 4: Simplify right side
    20,898.72x = 242,714,926.36
  5. Step 5: Solve for x
    x = 242,714,926.36/20,898.72
  6. Step 6: Final answer
    x = 11,613.87

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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.