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Finding the Fourth Proportional to 18,398.53, 25,389.21 and 10,015.03

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Solution

The fourth proportional to 18,398.53, 25,389.21 and 10,015.03 is: 13,820.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,398.53 : 25,389.21 = 10,015.03 : x
  2. Step 2: Convert to fraction form
    18,398.53/25,389.21 = 10,015.03/x
  3. Step 3: Cross multiply
    18,398.53x = 25,389.21 × 10,015.03
  4. Step 4: Simplify right side
    18,398.53x = 254,273,699.83
  5. Step 5: Solve for x
    x = 254,273,699.83/18,398.53
  6. Step 6: Final answer
    x = 13,820.33

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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.