Home / 20,778.08-31,148.64-7,627.38

Finding the Fourth Proportional to 20,778.08, 31,148.64 and 7,627.38

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Solution

The fourth proportional to 20,778.08, 31,148.64 and 7,627.38 is: 11,434.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,778.08 : 31,148.64 = 7,627.38 : x
  2. Step 2: Convert to fraction form
    20,778.08/31,148.64 = 7,627.38/x
  3. Step 3: Cross multiply
    20,778.08x = 31,148.64 × 7,627.38
  4. Step 4: Simplify right side
    20,778.08x = 237,582,513.76
  5. Step 5: Solve for x
    x = 237,582,513.76/20,778.08
  6. Step 6: Final answer
    x = 11,434.29

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1.5x scale

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.