Home / 31,724.77-43,760.36-20,409

Finding the Fourth Proportional to 31,724.77, 43,760.36 and 20,409

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Solution

The fourth proportional to 31,724.77, 43,760.36 and 20,409 is: 28,151.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,724.77 : 43,760.36 = 20,409 : x
  2. Step 2: Convert to fraction form
    31,724.77/43,760.36 = 20,409/x
  3. Step 3: Cross multiply
    31,724.77x = 43,760.36 × 20,409
  4. Step 4: Simplify right side
    31,724.77x = 893,105,187.24
  5. Step 5: Solve for x
    x = 893,105,187.24/31,724.77
  6. Step 6: Final answer
    x = 28,151.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.