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Finding the Fourth Proportional to 12,699.52, 19,040.05 and 5,306.09

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Solution

The fourth proportional to 12,699.52, 19,040.05 and 5,306.09 is: 7,955.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,699.52 : 19,040.05 = 5,306.09 : x
  2. Step 2: Convert to fraction form
    12,699.52/19,040.05 = 5,306.09/x
  3. Step 3: Cross multiply
    12,699.52x = 19,040.05 × 5,306.09
  4. Step 4: Simplify right side
    12,699.52x = 101,028,259.87
  5. Step 5: Solve for x
    x = 101,028,259.87/12,699.52
  6. Step 6: Final answer
    x = 7,955.28

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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.