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Finding the Fourth Proportional to 19,305.68, 29,103.19 and 18,019.75

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Solution

The fourth proportional to 19,305.68, 29,103.19 and 18,019.75 is: 27,164.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,305.68 : 29,103.19 = 18,019.75 : x
  2. Step 2: Convert to fraction form
    19,305.68/29,103.19 = 18,019.75/x
  3. Step 3: Cross multiply
    19,305.68x = 29,103.19 × 18,019.75
  4. Step 4: Simplify right side
    19,305.68x = 524,432,208.00
  5. Step 5: Solve for x
    x = 524,432,208.00/19,305.68
  6. Step 6: Final answer
    x = 27,164.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.