Home / 22,156.80-30,577.36-12,728.32

Finding the Fourth Proportional to 22,156.80, 30,577.36 and 12,728.32

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Solution

The fourth proportional to 22,156.80, 30,577.36 and 12,728.32 is: 17,565.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,156.80 : 30,577.36 = 12,728.32 : x
  2. Step 2: Convert to fraction form
    22,156.80/30,577.36 = 12,728.32/x
  3. Step 3: Cross multiply
    22,156.80x = 30,577.36 × 12,728.32
  4. Step 4: Simplify right side
    22,156.80x = 389,198,422.84
  5. Step 5: Solve for x
    x = 389,198,422.84/22,156.80
  6. Step 6: Final answer
    x = 17,565.64

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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.