Home / 18,403.80-25,393.66-12,729.34

Finding the Fourth Proportional to 18,403.80, 25,393.66 and 12,729.34

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Solution

The fourth proportional to 18,403.80, 25,393.66 and 12,729.34 is: 17,564.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,403.80 : 25,393.66 = 12,729.34 : x
  2. Step 2: Convert to fraction form
    18,403.80/25,393.66 = 12,729.34/x
  3. Step 3: Cross multiply
    18,403.80x = 25,393.66 × 12,729.34
  4. Step 4: Simplify right side
    18,403.80x = 323,244,531.98
  5. Step 5: Solve for x
    x = 323,244,531.98/18,403.80
  6. Step 6: Final answer
    x = 17,564.01

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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.