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Finding the Fourth Proportional to 18,563.48, 25,642.14 and 13,839.56

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Solution

The fourth proportional to 18,563.48, 25,642.14 and 13,839.56 is: 19,116.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,563.48 : 25,642.14 = 13,839.56 : x
  2. Step 2: Convert to fraction form
    18,563.48/25,642.14 = 13,839.56/x
  3. Step 3: Cross multiply
    18,563.48x = 25,642.14 × 13,839.56
  4. Step 4: Simplify right side
    18,563.48x = 354,875,935.06
  5. Step 5: Solve for x
    x = 354,875,935.06/18,563.48
  6. Step 6: Final answer
    x = 19,116.89

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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.