Home / 21,115.01-29,139.14-12,625.88

Finding the Fourth Proportional to 21,115.01, 29,139.14 and 12,625.88

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Solution

The fourth proportional to 21,115.01, 29,139.14 and 12,625.88 is: 17,423.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,115.01 : 29,139.14 = 12,625.88 : x
  2. Step 2: Convert to fraction form
    21,115.01/29,139.14 = 12,625.88/x
  3. Step 3: Cross multiply
    21,115.01x = 29,139.14 × 12,625.88
  4. Step 4: Simplify right side
    21,115.01x = 367,907,170.81
  5. Step 5: Solve for x
    x = 367,907,170.81/21,115.01
  6. Step 6: Final answer
    x = 17,423.96

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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.