Home / 21,090.54-29,102.78-12,136.29

Finding the Fourth Proportional to 21,090.54, 29,102.78 and 12,136.29

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Solution

The fourth proportional to 21,090.54, 29,102.78 and 12,136.29 is: 16,746.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,090.54 : 29,102.78 = 12,136.29 : x
  2. Step 2: Convert to fraction form
    21,090.54/29,102.78 = 12,136.29/x
  3. Step 3: Cross multiply
    21,090.54x = 29,102.78 × 12,136.29
  4. Step 4: Simplify right side
    21,090.54x = 353,199,717.20
  5. Step 5: Solve for x
    x = 353,199,717.20/21,090.54
  6. Step 6: Final answer
    x = 16,746.83

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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.