Home / 21,199.32-29,250.18-12,815.64

Finding the Fourth Proportional to 21,199.32, 29,250.18 and 12,815.64

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Solution

The fourth proportional to 21,199.32, 29,250.18 and 12,815.64 is: 17,682.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,199.32 : 29,250.18 = 12,815.64 : x
  2. Step 2: Convert to fraction form
    21,199.32/29,250.18 = 12,815.64/x
  3. Step 3: Cross multiply
    21,199.32x = 29,250.18 × 12,815.64
  4. Step 4: Simplify right side
    21,199.32x = 374,859,776.82
  5. Step 5: Solve for x
    x = 374,859,776.82/21,199.32
  6. Step 6: Final answer
    x = 17,682.63

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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.