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Finding the Fourth Proportional to 18,820, 28,324.42 and 14,164.12

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Solution

The fourth proportional to 18,820, 28,324.42 and 14,164.12 is: 21,317.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,820 : 28,324.42 = 14,164.12 : x
  2. Step 2: Convert to fraction form
    18,820/28,324.42 = 14,164.12/x
  3. Step 3: Cross multiply
    18,820x = 28,324.42 × 14,164.12
  4. Step 4: Simplify right side
    18,820x = 401,190,483.81
  5. Step 5: Solve for x
    x = 401,190,483.81/18,820
  6. Step 6: Final answer
    x = 21,317.24

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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.