Home / 20,826.90-31,244.58-7,679.34

Finding the Fourth Proportional to 20,826.90, 31,244.58 and 7,679.34

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Solution

The fourth proportional to 20,826.90, 31,244.58 and 7,679.34 is: 11,520.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,826.90 : 31,244.58 = 7,679.34 : x
  2. Step 2: Convert to fraction form
    20,826.90/31,244.58 = 7,679.34/x
  3. Step 3: Cross multiply
    20,826.90x = 31,244.58 × 7,679.34
  4. Step 4: Simplify right side
    20,826.90x = 239,937,752.98
  5. Step 5: Solve for x
    x = 239,937,752.98/20,826.90
  6. Step 6: Final answer
    x = 11,520.57

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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.