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Finding the Fourth Proportional to 38,145.69, 52,640.43 and 20,918.00

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Solution

The fourth proportional to 38,145.69, 52,640.43 and 20,918.00 is: 28,866.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,145.69 : 52,640.43 = 20,918.00 : x
  2. Step 2: Convert to fraction form
    38,145.69/52,640.43 = 20,918.00/x
  3. Step 3: Cross multiply
    38,145.69x = 52,640.43 × 20,918.00
  4. Step 4: Simplify right side
    38,145.69x = 1,101,132,251.54
  5. Step 5: Solve for x
    x = 1,101,132,251.54/38,145.69
  6. Step 6: Final answer
    x = 28,866.49

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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.