Home / 18,639.36-25,713.72-11,921.63

Finding the Fourth Proportional to 18,639.36, 25,713.72 and 11,921.63

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Solution

The fourth proportional to 18,639.36, 25,713.72 and 11,921.63 is: 16,446.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,639.36 : 25,713.72 = 11,921.63 : x
  2. Step 2: Convert to fraction form
    18,639.36/25,713.72 = 11,921.63/x
  3. Step 3: Cross multiply
    18,639.36x = 25,713.72 × 11,921.63
  4. Step 4: Simplify right side
    18,639.36x = 306,549,327.20
  5. Step 5: Solve for x
    x = 306,549,327.20/18,639.36
  6. Step 6: Final answer
    x = 16,446.34

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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.