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Finding the Fourth Proportional to 18,396, 25,386.60 and 10,012.56

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Solution

The fourth proportional to 18,396, 25,386.60 and 10,012.56 is: 13,817.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,396 : 25,386.60 = 10,012.56 : x
  2. Step 2: Convert to fraction form
    18,396/25,386.60 = 10,012.56/x
  3. Step 3: Cross multiply
    18,396x = 25,386.60 × 10,012.56
  4. Step 4: Simplify right side
    18,396x = 254,184,855.70
  5. Step 5: Solve for x
    x = 254,184,855.70/18,396
  6. Step 6: Final answer
    x = 13,817.40

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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.