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Finding the Fourth Proportional to 22,956.74, 31,681.80 and 12,885.80

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Solution

The fourth proportional to 22,956.74, 31,681.80 and 12,885.80 is: 17,783.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,956.74 : 31,681.80 = 12,885.80 : x
  2. Step 2: Convert to fraction form
    22,956.74/31,681.80 = 12,885.80/x
  3. Step 3: Cross multiply
    22,956.74x = 31,681.80 × 12,885.80
  4. Step 4: Simplify right side
    22,956.74x = 408,245,338.44
  5. Step 5: Solve for x
    x = 408,245,338.44/22,956.74
  6. Step 6: Final answer
    x = 17,783.25

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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.