Home / 20,931.46-31,371.65-11,571.10

Finding the Fourth Proportional to 20,931.46, 31,371.65 and 11,571.10

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Solution

The fourth proportional to 20,931.46, 31,371.65 and 11,571.10 is: 17,342.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,931.46 : 31,371.65 = 11,571.10 : x
  2. Step 2: Convert to fraction form
    20,931.46/31,371.65 = 11,571.10/x
  3. Step 3: Cross multiply
    20,931.46x = 31,371.65 × 11,571.10
  4. Step 4: Simplify right side
    20,931.46x = 363,004,499.32
  5. Step 5: Solve for x
    x = 363,004,499.32/20,931.46
  6. Step 6: Final answer
    x = 17,342.53

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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.