Home / 22,963.50-31,690.80-12,891.42

Finding the Fourth Proportional to 22,963.50, 31,690.80 and 12,891.42

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Solution

The fourth proportional to 22,963.50, 31,690.80 and 12,891.42 is: 17,790.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,963.50 : 31,690.80 = 12,891.42 : x
  2. Step 2: Convert to fraction form
    22,963.50/31,690.80 = 12,891.42/x
  3. Step 3: Cross multiply
    22,963.50x = 31,690.80 × 12,891.42
  4. Step 4: Simplify right side
    22,963.50x = 408,539,412.94
  5. Step 5: Solve for x
    x = 408,539,412.94/22,963.50
  6. Step 6: Final answer
    x = 17,790.82

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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.