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Finding the Fourth Proportional to 18,274.78, 25,219.26 and 9,891.28

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Solution

The fourth proportional to 18,274.78, 25,219.26 and 9,891.28 is: 13,650.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,274.78 : 25,219.26 = 9,891.28 : x
  2. Step 2: Convert to fraction form
    18,274.78/25,219.26 = 9,891.28/x
  3. Step 3: Cross multiply
    18,274.78x = 25,219.26 × 9,891.28
  4. Step 4: Simplify right side
    18,274.78x = 249,450,635.96
  5. Step 5: Solve for x
    x = 249,450,635.96/18,274.78
  6. Step 6: Final answer
    x = 13,650.00

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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.