Home / 19,133.12-28,705.72-12,156.64

Finding the Fourth Proportional to 19,133.12, 28,705.72 and 12,156.64

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Solution

The fourth proportional to 19,133.12, 28,705.72 and 12,156.64 is: 18,238.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,133.12 : 28,705.72 = 12,156.64 : x
  2. Step 2: Convert to fraction form
    19,133.12/28,705.72 = 12,156.64/x
  3. Step 3: Cross multiply
    19,133.12x = 28,705.72 × 12,156.64
  4. Step 4: Simplify right side
    19,133.12x = 348,965,103.98
  5. Step 5: Solve for x
    x = 348,965,103.98/19,133.12
  6. Step 6: Final answer
    x = 18,238.80

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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.