Home / 20,998,043.28-31,461,606.36-12,894,129.36

Finding the Fourth Proportional to 20,998,043.28, 31,461,606.36 and 12,894,129.36

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Solution

The fourth proportional to 20,998,043.28, 31,461,606.36 and 12,894,129.36 is: 19,319,420.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,998,043.28 : 31,461,606.36 = 12,894,129.36 : x
  2. Step 2: Convert to fraction form
    20,998,043.28/31,461,606.36 = 12,894,129.36/x
  3. Step 3: Cross multiply
    20,998,043.28x = 31,461,606.36 × 12,894,129.36
  4. Step 4: Simplify right side
    20,998,043.28x = 405,670,022,279,238.69
  5. Step 5: Solve for x
    x = 405,670,022,279,238.69/20,998,043.28
  6. Step 6: Final answer
    x = 19,319,420.24

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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.