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Finding the Fourth Proportional to 30,008.67, 45,009.28 and 18,765.00

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Solution

The fourth proportional to 30,008.67, 45,009.28 and 18,765.00 is: 28,145.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,008.67 : 45,009.28 = 18,765.00 : x
  2. Step 2: Convert to fraction form
    30,008.67/45,009.28 = 18,765.00/x
  3. Step 3: Cross multiply
    30,008.67x = 45,009.28 × 18,765.00
  4. Step 4: Simplify right side
    30,008.67x = 844,598,820.33
  5. Step 5: Solve for x
    x = 844,598,820.33/30,008.67
  6. Step 6: Final answer
    x = 28,145.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.