Home / 21,115.14-29,134.27-12,615.99

Finding the Fourth Proportional to 21,115.14, 29,134.27 and 12,615.99

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Solution

The fourth proportional to 21,115.14, 29,134.27 and 12,615.99 is: 17,407.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,115.14 : 29,134.27 = 12,615.99 : x
  2. Step 2: Convert to fraction form
    21,115.14/29,134.27 = 12,615.99/x
  3. Step 3: Cross multiply
    21,115.14x = 29,134.27 × 12,615.99
  4. Step 4: Simplify right side
    21,115.14x = 367,557,658.98
  5. Step 5: Solve for x
    x = 367,557,658.98/21,115.14
  6. Step 6: Final answer
    x = 17,407.30

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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.