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Finding the Fourth Proportional to 14,685.40, 20,265.94 and 7,971.14

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Solution

The fourth proportional to 14,685.40, 20,265.94 and 7,971.14 is: 11,000.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,685.40 : 20,265.94 = 7,971.14 : x
  2. Step 2: Convert to fraction form
    14,685.40/20,265.94 = 7,971.14/x
  3. Step 3: Cross multiply
    14,685.40x = 20,265.94 × 7,971.14
  4. Step 4: Simplify right side
    14,685.40x = 161,542,644.97
  5. Step 5: Solve for x
    x = 161,542,644.97/14,685.40
  6. Step 6: Final answer
    x = 11,000.22

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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.