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Finding the Fourth Proportional to 18,278.78, 25,224.79 and 9,895.28

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Solution

The fourth proportional to 18,278.78, 25,224.79 and 9,895.28 is: 13,655.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,278.78 : 25,224.79 = 9,895.28 : x
  2. Step 2: Convert to fraction form
    18,278.78/25,224.79 = 9,895.28/x
  3. Step 3: Cross multiply
    18,278.78x = 25,224.79 × 9,895.28
  4. Step 4: Simplify right side
    18,278.78x = 249,606,233.87
  5. Step 5: Solve for x
    x = 249,606,233.87/18,278.78
  6. Step 6: Final answer
    x = 13,655.52

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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.