Home / 22,157.80-30,578.74-12,729.32

Finding the Fourth Proportional to 22,157.80, 30,578.74 and 12,729.32

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Solution

The fourth proportional to 22,157.80, 30,578.74 and 12,729.32 is: 17,567.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,157.80 : 30,578.74 = 12,729.32 : x
  2. Step 2: Convert to fraction form
    22,157.80/30,578.74 = 12,729.32/x
  3. Step 3: Cross multiply
    22,157.80x = 30,578.74 × 12,729.32
  4. Step 4: Simplify right side
    22,157.80x = 389,246,566.66
  5. Step 5: Solve for x
    x = 389,246,566.66/22,157.80
  6. Step 6: Final answer
    x = 17,567.02

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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.