Home / 13,939.08-20,921.22-12,456.06

Finding the Fourth Proportional to 13,939.08, 20,921.22 and 12,456.06

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Solution

The fourth proportional to 13,939.08, 20,921.22 and 12,456.06 is: 18,695.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,939.08 : 20,921.22 = 12,456.06 : x
  2. Step 2: Convert to fraction form
    13,939.08/20,921.22 = 12,456.06/x
  3. Step 3: Cross multiply
    13,939.08x = 20,921.22 × 12,456.06
  4. Step 4: Simplify right side
    13,939.08x = 260,595,971.59
  5. Step 5: Solve for x
    x = 260,595,971.59/13,939.08
  6. Step 6: Final answer
    x = 18,695.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.