Home / 21,270.87-31,906.32-8,777.17

Finding the Fourth Proportional to 21,270.87, 31,906.32 and 8,777.17

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Solution

The fourth proportional to 21,270.87, 31,906.32 and 8,777.17 is: 13,165.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,270.87 : 31,906.32 = 8,777.17 : x
  2. Step 2: Convert to fraction form
    21,270.87/31,906.32 = 8,777.17/x
  3. Step 3: Cross multiply
    21,270.87x = 31,906.32 × 8,777.17
  4. Step 4: Simplify right side
    21,270.87x = 280,047,194.71
  5. Step 5: Solve for x
    x = 280,047,194.71/21,270.87
  6. Step 6: Final answer
    x = 13,165.76

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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.