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Finding the Fourth Proportional to 18,396.40, 25,386.30 and 10,012.92

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Solution

The fourth proportional to 18,396.40, 25,386.30 and 10,012.92 is: 13,817.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,396.40 : 25,386.30 = 10,012.92 : x
  2. Step 2: Convert to fraction form
    18,396.40/25,386.30 = 10,012.92/x
  3. Step 3: Cross multiply
    18,396.40x = 25,386.30 × 10,012.92
  4. Step 4: Simplify right side
    18,396.40x = 254,190,991.00
  5. Step 5: Solve for x
    x = 254,190,991.00/18,396.40
  6. Step 6: Final answer
    x = 13,817.43

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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.