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Finding the Fourth Proportional to 13,988.54, 19,303.44 and 8,019.92

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Solution

The fourth proportional to 13,988.54, 19,303.44 and 8,019.92 is: 11,067.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,988.54 : 19,303.44 = 8,019.92 : x
  2. Step 2: Convert to fraction form
    13,988.54/19,303.44 = 8,019.92/x
  3. Step 3: Cross multiply
    13,988.54x = 19,303.44 × 8,019.92
  4. Step 4: Simplify right side
    13,988.54x = 154,812,044.52
  5. Step 5: Solve for x
    x = 154,812,044.52/13,988.54
  6. Step 6: Final answer
    x = 11,067.06

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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.