Home / 20,911.08-31,358.44-7,580.92

Finding the Fourth Proportional to 20,911.08, 31,358.44 and 7,580.92

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Solution

The fourth proportional to 20,911.08, 31,358.44 and 7,580.92 is: 11,368.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,911.08 : 31,358.44 = 7,580.92 : x
  2. Step 2: Convert to fraction form
    20,911.08/31,358.44 = 7,580.92/x
  3. Step 3: Cross multiply
    20,911.08x = 31,358.44 × 7,580.92
  4. Step 4: Simplify right side
    20,911.08x = 237,725,824.96
  5. Step 5: Solve for x
    x = 237,725,824.96/20,911.08
  6. Step 6: Final answer
    x = 11,368.41

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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.