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Finding the Fourth Proportional to 12,699.78, 19,008.27 and 11,487.30

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Solution

The fourth proportional to 12,699.78, 19,008.27 and 11,487.30 is: 17,193.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,699.78 : 19,008.27 = 11,487.30 : x
  2. Step 2: Convert to fraction form
    12,699.78/19,008.27 = 11,487.30/x
  3. Step 3: Cross multiply
    12,699.78x = 19,008.27 × 11,487.30
  4. Step 4: Simplify right side
    12,699.78x = 218,353,699.97
  5. Step 5: Solve for x
    x = 218,353,699.97/12,699.78
  6. Step 6: Final answer
    x = 17,193.50

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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.