Home / 20,881,129.75-28,819,424.70-12,179,302.38

Finding the Fourth Proportional to 20,881,129.75, 28,819,424.70 and 12,179,302.38

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Solution

The fourth proportional to 20,881,129.75, 28,819,424.70 and 12,179,302.38 is: 16,809,458.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,881,129.75 : 28,819,424.70 = 12,179,302.38 : x
  2. Step 2: Convert to fraction form
    20,881,129.75/28,819,424.70 = 12,179,302.38/x
  3. Step 3: Cross multiply
    20,881,129.75x = 28,819,424.70 × 12,179,302.38
  4. Step 4: Simplify right side
    20,881,129.75x = 351,000,487,838,940.81
  5. Step 5: Solve for x
    x = 351,000,487,838,940.81/20,881,129.75
  6. Step 6: Final answer
    x = 16,809,458.69

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.