Home / 21,245.72-29,311.26-12,859.16

Finding the Fourth Proportional to 21,245.72, 29,311.26 and 12,859.16

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Solution

The fourth proportional to 21,245.72, 29,311.26 and 12,859.16 is: 17,740.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,245.72 : 29,311.26 = 12,859.16 : x
  2. Step 2: Convert to fraction form
    21,245.72/29,311.26 = 12,859.16/x
  3. Step 3: Cross multiply
    21,245.72x = 29,311.26 × 12,859.16
  4. Step 4: Simplify right side
    21,245.72x = 376,918,182.14
  5. Step 5: Solve for x
    x = 376,918,182.14/21,245.72
  6. Step 6: Final answer
    x = 17,740.90

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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.