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Finding the Fourth Proportional to 30,009.26, 45,009.17 and 18,881.89

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Solution

The fourth proportional to 30,009.26, 45,009.17 and 18,881.89 is: 28,319.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,009.26 : 45,009.17 = 18,881.89 : x
  2. Step 2: Convert to fraction form
    30,009.26/45,009.17 = 18,881.89/x
  3. Step 3: Cross multiply
    30,009.26x = 45,009.17 × 18,881.89
  4. Step 4: Simplify right side
    30,009.26x = 849,858,060.81
  5. Step 5: Solve for x
    x = 849,858,060.81/30,009.26
  6. Step 6: Final answer
    x = 28,319.86

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1.5x scale

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.