Home / 21,315.37-29,405.87-20,327.17

Finding the Fourth Proportional to 21,315.37, 29,405.87 and 20,327.17

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Solution

The fourth proportional to 21,315.37, 29,405.87 and 20,327.17 is: 28,042.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,315.37 : 29,405.87 = 20,327.17 : x
  2. Step 2: Convert to fraction form
    21,315.37/29,405.87 = 20,327.17/x
  3. Step 3: Cross multiply
    21,315.37x = 29,405.87 × 20,327.17
  4. Step 4: Simplify right side
    21,315.37x = 597,738,118.49
  5. Step 5: Solve for x
    x = 597,738,118.49/21,315.37
  6. Step 6: Final answer
    x = 28,042.59

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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.