Home / 12,739.39-19,089.60-5,339.81

Finding the Fourth Proportional to 12,739.39, 19,089.60 and 5,339.81

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Solution

The fourth proportional to 12,739.39, 19,089.60 and 5,339.81 is: 8,001.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,739.39 : 19,089.60 = 5,339.81 : x
  2. Step 2: Convert to fraction form
    12,739.39/19,089.60 = 5,339.81/x
  3. Step 3: Cross multiply
    12,739.39x = 19,089.60 × 5,339.81
  4. Step 4: Simplify right side
    12,739.39x = 101,934,810.28
  5. Step 5: Solve for x
    x = 101,934,810.28/12,739.39
  6. Step 6: Final answer
    x = 8,001.55

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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.