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Finding the Fourth Proportional to 18,820.50, 28,325.18 and 14,164.62

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Solution

The fourth proportional to 18,820.50, 28,325.18 and 14,164.62 is: 21,318.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,820.50 : 28,325.18 = 14,164.62 : x
  2. Step 2: Convert to fraction form
    18,820.50/28,325.18 = 14,164.62/x
  3. Step 3: Cross multiply
    18,820.50x = 28,325.18 × 14,164.62
  4. Step 4: Simplify right side
    18,820.50x = 401,215,340.31
  5. Step 5: Solve for x
    x = 401,215,340.31/18,820.50
  6. Step 6: Final answer
    x = 21,318.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.