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Finding the Fourth Proportional to 12,809.55, 19,212.93 and 4,039.68

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Solution

The fourth proportional to 12,809.55, 19,212.93 and 4,039.68 is: 6,059.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,809.55 : 19,212.93 = 4,039.68 : x
  2. Step 2: Convert to fraction form
    12,809.55/19,212.93 = 4,039.68/x
  3. Step 3: Cross multiply
    12,809.55x = 19,212.93 × 4,039.68
  4. Step 4: Simplify right side
    12,809.55x = 77,614,089.06
  5. Step 5: Solve for x
    x = 77,614,089.06/12,809.55
  6. Step 6: Final answer
    x = 6,059.08

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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.