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Finding the Fourth Proportional to 19,699.70, 29,549.55 and 8,021.30

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Solution

The fourth proportional to 19,699.70, 29,549.55 and 8,021.30 is: 12,031.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,699.70 : 29,549.55 = 8,021.30 : x
  2. Step 2: Convert to fraction form
    19,699.70/29,549.55 = 8,021.30/x
  3. Step 3: Cross multiply
    19,699.70x = 29,549.55 × 8,021.30
  4. Step 4: Simplify right side
    19,699.70x = 237,025,805.42
  5. Step 5: Solve for x
    x = 237,025,805.42/19,699.70
  6. Step 6: Final answer
    x = 12,031.95

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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.