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Finding the Fourth Proportional to 19,699.61, 27,195.50 and 15,213.29

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Solution

The fourth proportional to 19,699.61, 27,195.50 and 15,213.29 is: 21,002.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,699.61 : 27,195.50 = 15,213.29 : x
  2. Step 2: Convert to fraction form
    19,699.61/27,195.50 = 15,213.29/x
  3. Step 3: Cross multiply
    19,699.61x = 27,195.50 × 15,213.29
  4. Step 4: Simplify right side
    19,699.61x = 413,732,952.13
  5. Step 5: Solve for x
    x = 413,732,952.13/19,699.61
  6. Step 6: Final answer
    x = 21,002.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.