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Finding the Fourth Proportional to 19,686.70, 29,530.05 and 8,008.30

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Solution

The fourth proportional to 19,686.70, 29,530.05 and 8,008.30 is: 12,012.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,686.70 : 29,530.05 = 8,008.30 : x
  2. Step 2: Convert to fraction form
    19,686.70/29,530.05 = 8,008.30/x
  3. Step 3: Cross multiply
    19,686.70x = 29,530.05 × 8,008.30
  4. Step 4: Simplify right side
    19,686.70x = 236,485,499.42
  5. Step 5: Solve for x
    x = 236,485,499.42/19,686.70
  6. Step 6: Final answer
    x = 12,012.45

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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.