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Finding the Fourth Proportional to 14,685.64, 20,266.11 and 7,971.21

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Solution

The fourth proportional to 14,685.64, 20,266.11 and 7,971.21 is: 11,000.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,685.64 : 20,266.11 = 7,971.21 : x
  2. Step 2: Convert to fraction form
    14,685.64/20,266.11 = 7,971.21/x
  3. Step 3: Cross multiply
    14,685.64x = 20,266.11 × 7,971.21
  4. Step 4: Simplify right side
    14,685.64x = 161,545,396.27
  5. Step 5: Solve for x
    x = 161,545,396.27/14,685.64
  6. Step 6: Final answer
    x = 11,000.23

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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.