Home / 20,748.30-31,109.88-8,270.22

Finding the Fourth Proportional to 20,748.30, 31,109.88 and 8,270.22

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Solution

The fourth proportional to 20,748.30, 31,109.88 and 8,270.22 is: 12,400.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,748.30 : 31,109.88 = 8,270.22 : x
  2. Step 2: Convert to fraction form
    20,748.30/31,109.88 = 8,270.22/x
  3. Step 3: Cross multiply
    20,748.30x = 31,109.88 × 8,270.22
  4. Step 4: Simplify right side
    20,748.30x = 257,285,551.77
  5. Step 5: Solve for x
    x = 257,285,551.77/20,748.30
  6. Step 6: Final answer
    x = 12,400.32

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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.