Home / 21,189.22-29,242.32-12,808.42

Finding the Fourth Proportional to 21,189.22, 29,242.32 and 12,808.42

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Solution

The fourth proportional to 21,189.22, 29,242.32 and 12,808.42 is: 17,676.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,189.22 : 29,242.32 = 12,808.42 : x
  2. Step 2: Convert to fraction form
    21,189.22/29,242.32 = 12,808.42/x
  3. Step 3: Cross multiply
    21,189.22x = 29,242.32 × 12,808.42
  4. Step 4: Simplify right side
    21,189.22x = 374,547,916.33
  5. Step 5: Solve for x
    x = 374,547,916.33/21,189.22
  6. Step 6: Final answer
    x = 17,676.34

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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.