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Finding the Fourth Proportional to 14,513.25, 20,028.30 and 7,889.25

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Solution

The fourth proportional to 14,513.25, 20,028.30 and 7,889.25 is: 10,887.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,513.25 : 20,028.30 = 7,889.25 : x
  2. Step 2: Convert to fraction form
    14,513.25/20,028.30 = 7,889.25/x
  3. Step 3: Cross multiply
    14,513.25x = 20,028.30 × 7,889.25
  4. Step 4: Simplify right side
    14,513.25x = 158,008,265.78
  5. Step 5: Solve for x
    x = 158,008,265.78/14,513.25
  6. Step 6: Final answer
    x = 10,887.17

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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.