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Finding the Fourth Proportional to 18,504.64, 25,538.20 and 10,122.40

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Solution

The fourth proportional to 18,504.64, 25,538.20 and 10,122.40 is: 13,969.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,504.64 : 25,538.20 = 10,122.40 : x
  2. Step 2: Convert to fraction form
    18,504.64/25,538.20 = 10,122.40/x
  3. Step 3: Cross multiply
    18,504.64x = 25,538.20 × 10,122.40
  4. Step 4: Simplify right side
    18,504.64x = 258,507,875.68
  5. Step 5: Solve for x
    x = 258,507,875.68/18,504.64
  6. Step 6: Final answer
    x = 13,969.89

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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.