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Finding the Fourth Proportional to 12,750.69, 19,129.12 and 4,429.50

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Solution

The fourth proportional to 12,750.69, 19,129.12 and 4,429.50 is: 6,645.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,750.69 : 19,129.12 = 4,429.50 : x
  2. Step 2: Convert to fraction form
    12,750.69/19,129.12 = 4,429.50/x
  3. Step 3: Cross multiply
    12,750.69x = 19,129.12 × 4,429.50
  4. Step 4: Simplify right side
    12,750.69x = 84,732,425.97
  5. Step 5: Solve for x
    x = 84,732,425.97/12,750.69
  6. Step 6: Final answer
    x = 6,645.32

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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.