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Finding the Fourth Proportional to 12,874.04, 19,313.15 and 3,987.29

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Solution

The fourth proportional to 12,874.04, 19,313.15 and 3,987.29 is: 5,981.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,874.04 : 19,313.15 = 3,987.29 : x
  2. Step 2: Convert to fraction form
    12,874.04/19,313.15 = 3,987.29/x
  3. Step 3: Cross multiply
    12,874.04x = 19,313.15 × 3,987.29
  4. Step 4: Simplify right side
    12,874.04x = 77,007,180.64
  5. Step 5: Solve for x
    x = 77,007,180.64/12,874.04
  6. Step 6: Final answer
    x = 5,981.59

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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.