Home / 20,392.34-28,157.34-13,225.66

Finding the Fourth Proportional to 20,392.34, 28,157.34 and 13,225.66

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Solution

The fourth proportional to 20,392.34, 28,157.34 and 13,225.66 is: 18,261.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,392.34 : 28,157.34 = 13,225.66 : x
  2. Step 2: Convert to fraction form
    20,392.34/28,157.34 = 13,225.66/x
  3. Step 3: Cross multiply
    20,392.34x = 28,157.34 × 13,225.66
  4. Step 4: Simplify right side
    20,392.34x = 372,399,405.34
  5. Step 5: Solve for x
    x = 372,399,405.34/20,392.34
  6. Step 6: Final answer
    x = 18,261.73

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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.