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Finding the Fourth Proportional to 18,607.78, 25,678.16 and 10,649.48

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Solution

The fourth proportional to 18,607.78, 25,678.16 and 10,649.48 is: 14,695.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,607.78 : 25,678.16 = 10,649.48 : x
  2. Step 2: Convert to fraction form
    18,607.78/25,678.16 = 10,649.48/x
  3. Step 3: Cross multiply
    18,607.78x = 25,678.16 × 10,649.48
  4. Step 4: Simplify right side
    18,607.78x = 273,458,969.56
  5. Step 5: Solve for x
    x = 273,458,969.56/18,607.78
  6. Step 6: Final answer
    x = 14,695.95

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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.