Home / 12,931-19,397.63-3,571.03

Finding the Fourth Proportional to 12,931, 19,397.63 and 3,571.03

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Solution

The fourth proportional to 12,931, 19,397.63 and 3,571.03 is: 5,356.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,931 : 19,397.63 = 3,571.03 : x
  2. Step 2: Convert to fraction form
    12,931/19,397.63 = 3,571.03/x
  3. Step 3: Cross multiply
    12,931x = 19,397.63 × 3,571.03
  4. Step 4: Simplify right side
    12,931x = 69,269,500.80
  5. Step 5: Solve for x
    x = 69,269,500.80/12,931
  6. Step 6: Final answer
    x = 5,356.86

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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.