Home / 21,771.23-30,047.58-13,278.28

Finding the Fourth Proportional to 21,771.23, 30,047.58 and 13,278.28

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Solution

The fourth proportional to 21,771.23, 30,047.58 and 13,278.28 is: 18,326.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,771.23 : 30,047.58 = 13,278.28 : x
  2. Step 2: Convert to fraction form
    21,771.23/30,047.58 = 13,278.28/x
  3. Step 3: Cross multiply
    21,771.23x = 30,047.58 × 13,278.28
  4. Step 4: Simplify right side
    21,771.23x = 398,980,180.56
  5. Step 5: Solve for x
    x = 398,980,180.56/21,771.23
  6. Step 6: Final answer
    x = 18,326.03

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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.