Home / 21,053.32-29,049.70-11,978.15

Finding the Fourth Proportional to 21,053.32, 29,049.70 and 11,978.15

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Solution

The fourth proportional to 21,053.32, 29,049.70 and 11,978.15 is: 16,527.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,053.32 : 29,049.70 = 11,978.15 : x
  2. Step 2: Convert to fraction form
    21,053.32/29,049.70 = 11,978.15/x
  3. Step 3: Cross multiply
    21,053.32x = 29,049.70 × 11,978.15
  4. Step 4: Simplify right side
    21,053.32x = 347,961,604.16
  5. Step 5: Solve for x
    x = 347,961,604.16/21,053.32
  6. Step 6: Final answer
    x = 16,527.64

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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.