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Finding the Fourth Proportional to 21,199.70, 31,811.70 and 14,630.60

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Solution

The fourth proportional to 21,199.70, 31,811.70 and 14,630.60 is: 21,954.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,199.70 : 31,811.70 = 14,630.60 : x
  2. Step 2: Convert to fraction form
    21,199.70/31,811.70 = 14,630.60/x
  3. Step 3: Cross multiply
    21,199.70x = 31,811.70 × 14,630.60
  4. Step 4: Simplify right side
    21,199.70x = 465,424,258.02
  5. Step 5: Solve for x
    x = 465,424,258.02/21,199.70
  6. Step 6: Final answer
    x = 21,954.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.