Home / 21,189.16-29,243.94-12,808.36

Finding the Fourth Proportional to 21,189.16, 29,243.94 and 12,808.36

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Solution

The fourth proportional to 21,189.16, 29,243.94 and 12,808.36 is: 17,677.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,189.16 : 29,243.94 = 12,808.36 : x
  2. Step 2: Convert to fraction form
    21,189.16/29,243.94 = 12,808.36/x
  3. Step 3: Cross multiply
    21,189.16x = 29,243.94 × 12,808.36
  4. Step 4: Simplify right side
    21,189.16x = 374,566,911.34
  5. Step 5: Solve for x
    x = 374,566,911.34/21,189.16
  6. Step 6: Final answer
    x = 17,677.29

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1.5x scale

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.