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Finding the Fourth Proportional to 18,655.54, 25,736.79 and 12,356.98

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Solution

The fourth proportional to 18,655.54, 25,736.79 and 12,356.98 is: 17,047.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,655.54 : 25,736.79 = 12,356.98 : x
  2. Step 2: Convert to fraction form
    18,655.54/25,736.79 = 12,356.98/x
  3. Step 3: Cross multiply
    18,655.54x = 25,736.79 × 12,356.98
  4. Step 4: Simplify right side
    18,655.54x = 318,028,999.29
  5. Step 5: Solve for x
    x = 318,028,999.29/18,655.54
  6. Step 6: Final answer
    x = 17,047.43

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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.