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Finding the Fourth Proportional to 19,480.65, 26,885.25 and 11,931.90

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Solution

The fourth proportional to 19,480.65, 26,885.25 and 11,931.90 is: 16,467.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,480.65 : 26,885.25 = 11,931.90 : x
  2. Step 2: Convert to fraction form
    19,480.65/26,885.25 = 11,931.90/x
  3. Step 3: Cross multiply
    19,480.65x = 26,885.25 × 11,931.90
  4. Step 4: Simplify right side
    19,480.65x = 320,792,114.48
  5. Step 5: Solve for x
    x = 320,792,114.48/19,480.65
  6. Step 6: Final answer
    x = 16,467.22

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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.