Home / 20,822.87-31,212.43-7,666.85

Finding the Fourth Proportional to 20,822.87, 31,212.43 and 7,666.85

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Solution

The fourth proportional to 20,822.87, 31,212.43 and 7,666.85 is: 11,492.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,822.87 : 31,212.43 = 7,666.85 : x
  2. Step 2: Convert to fraction form
    20,822.87/31,212.43 = 7,666.85/x
  3. Step 3: Cross multiply
    20,822.87x = 31,212.43 × 7,666.85
  4. Step 4: Simplify right side
    20,822.87x = 239,301,018.95
  5. Step 5: Solve for x
    x = 239,301,018.95/20,822.87
  6. Step 6: Final answer
    x = 11,492.22

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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.