Home / 12,969,400.80-17,898,699.78-7,168,057.68

Finding the Fourth Proportional to 12,969,400.80, 17,898,699.78 and 7,168,057.68

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Solution

The fourth proportional to 12,969,400.80, 17,898,699.78 and 7,168,057.68 is: 9,892,431.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,969,400.80 : 17,898,699.78 = 7,168,057.68 : x
  2. Step 2: Convert to fraction form
    12,969,400.80/17,898,699.78 = 7,168,057.68/x
  3. Step 3: Cross multiply
    12,969,400.80x = 17,898,699.78 × 7,168,057.68
  4. Step 4: Simplify right side
    12,969,400.80x = 128,298,912,420,043.31
  5. Step 5: Solve for x
    x = 128,298,912,420,043.31/12,969,400.80
  6. Step 6: Final answer
    x = 9,892,431.76

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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.