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Finding the Fourth Proportional to 18,503.12, 25,534.68 and 10,120.16

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Solution

The fourth proportional to 18,503.12, 25,534.68 and 10,120.16 is: 13,966.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,503.12 : 25,534.68 = 10,120.16 : x
  2. Step 2: Convert to fraction form
    18,503.12/25,534.68 = 10,120.16/x
  3. Step 3: Cross multiply
    18,503.12x = 25,534.68 × 10,120.16
  4. Step 4: Simplify right side
    18,503.12x = 258,415,047.15
  5. Step 5: Solve for x
    x = 258,415,047.15/18,503.12
  6. Step 6: Final answer
    x = 13,966.03

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.