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Finding the Fourth Proportional to 19,678.72, 29,525.12 and 7,998.72

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Solution

The fourth proportional to 19,678.72, 29,525.12 and 7,998.72 is: 12,000.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,678.72 : 29,525.12 = 7,998.72 : x
  2. Step 2: Convert to fraction form
    19,678.72/29,525.12 = 7,998.72/x
  3. Step 3: Cross multiply
    19,678.72x = 29,525.12 × 7,998.72
  4. Step 4: Simplify right side
    19,678.72x = 236,163,167.85
  5. Step 5: Solve for x
    x = 236,163,167.85/19,678.72
  6. Step 6: Final answer
    x = 12,000.94

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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.