Home / 21,135,918.69-29,167,572.03-12,875,978.46

Finding the Fourth Proportional to 21,135,918.69, 29,167,572.03 and 12,875,978.46

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Solution

The fourth proportional to 21,135,918.69, 29,167,572.03 and 12,875,978.46 is: 17,768,852.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,135,918.69 : 29,167,572.03 = 12,875,978.46 : x
  2. Step 2: Convert to fraction form
    21,135,918.69/29,167,572.03 = 12,875,978.46/x
  3. Step 3: Cross multiply
    21,135,918.69x = 29,167,572.03 × 12,875,978.46
  4. Step 4: Simplify right side
    21,135,918.69x = 375,561,029,188,778.50
  5. Step 5: Solve for x
    x = 375,561,029,188,778.50/21,135,918.69
  6. Step 6: Final answer
    x = 17,768,852.86

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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.