Home / 21,090.24-29,104.38-12,137.58

Finding the Fourth Proportional to 21,090.24, 29,104.38 and 12,137.58

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Solution

The fourth proportional to 21,090.24, 29,104.38 and 12,137.58 is: 16,749.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,090.24 : 29,104.38 = 12,137.58 : x
  2. Step 2: Convert to fraction form
    21,090.24/29,104.38 = 12,137.58/x
  3. Step 3: Cross multiply
    21,090.24x = 29,104.38 × 12,137.58
  4. Step 4: Simplify right side
    21,090.24x = 353,256,740.60
  5. Step 5: Solve for x
    x = 353,256,740.60/21,090.24
  6. Step 6: Final answer
    x = 16,749.77

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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.