Home / 17,665.70-26,455.35-8,420.90

Finding the Fourth Proportional to 17,665.70, 26,455.35 and 8,420.90

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Solution

The fourth proportional to 17,665.70, 26,455.35 and 8,420.90 is: 12,610.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,665.70 : 26,455.35 = 8,420.90 : x
  2. Step 2: Convert to fraction form
    17,665.70/26,455.35 = 8,420.90/x
  3. Step 3: Cross multiply
    17,665.70x = 26,455.35 × 8,420.90
  4. Step 4: Simplify right side
    17,665.70x = 222,777,856.82
  5. Step 5: Solve for x
    x = 222,777,856.82/17,665.70
  6. Step 6: Final answer
    x = 12,610.76

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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.