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Finding the Fourth Proportional to 18,398.76, 25,390.17 and 10,015.26

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Solution

The fourth proportional to 18,398.76, 25,390.17 and 10,015.26 is: 13,820.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,398.76 : 25,390.17 = 10,015.26 : x
  2. Step 2: Convert to fraction form
    18,398.76/25,390.17 = 10,015.26/x
  3. Step 3: Cross multiply
    18,398.76x = 25,390.17 × 10,015.26
  4. Step 4: Simplify right side
    18,398.76x = 254,289,153.99
  5. Step 5: Solve for x
    x = 254,289,153.99/18,398.76
  6. Step 6: Final answer
    x = 13,820.99

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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.