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Finding the Fourth Proportional to 13,987.18, 19,304.90 and 8,018.90

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Solution

The fourth proportional to 13,987.18, 19,304.90 and 8,018.90 is: 11,067.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,987.18 : 19,304.90 = 8,018.90 : x
  2. Step 2: Convert to fraction form
    13,987.18/19,304.90 = 8,018.90/x
  3. Step 3: Cross multiply
    13,987.18x = 19,304.90 × 8,018.90
  4. Step 4: Simplify right side
    13,987.18x = 154,804,062.61
  5. Step 5: Solve for x
    x = 154,804,062.61/13,987.18
  6. Step 6: Final answer
    x = 11,067.57

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1.5x scale

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.