Home / 21,219,405.73-31,806,447.42-12,101,871.07

Finding the Fourth Proportional to 21,219,405.73, 31,806,447.42 and 12,101,871.07

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Solution

The fourth proportional to 21,219,405.73, 31,806,447.42 and 12,101,871.07 is: 18,139,882.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,219,405.73 : 31,806,447.42 = 12,101,871.07 : x
  2. Step 2: Convert to fraction form
    21,219,405.73/31,806,447.42 = 12,101,871.07/x
  3. Step 3: Cross multiply
    21,219,405.73x = 31,806,447.42 × 12,101,871.07
  4. Step 4: Simplify right side
    21,219,405.73x = 384,917,525,956,714.19
  5. Step 5: Solve for x
    x = 384,917,525,956,714.19/21,219,405.73
  6. Step 6: Final answer
    x = 18,139,882.47

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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.