Home / 21,022.32-29,005.68-12,518.99

Finding the Fourth Proportional to 21,022.32, 29,005.68 and 12,518.99

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Solution

The fourth proportional to 21,022.32, 29,005.68 and 12,518.99 is: 17,273.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,022.32 : 29,005.68 = 12,518.99 : x
  2. Step 2: Convert to fraction form
    21,022.32/29,005.68 = 12,518.99/x
  3. Step 3: Cross multiply
    21,022.32x = 29,005.68 × 12,518.99
  4. Step 4: Simplify right side
    21,022.32x = 363,121,672.83
  5. Step 5: Solve for x
    x = 363,121,672.83/21,022.32
  6. Step 6: Final answer
    x = 17,273.15

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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.