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Finding the Fourth Proportional to 30,139.62, 41,587.62 and 20,083.08

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Solution

The fourth proportional to 30,139.62, 41,587.62 and 20,083.08 is: 27,711.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,139.62 : 41,587.62 = 20,083.08 : x
  2. Step 2: Convert to fraction form
    30,139.62/41,587.62 = 20,083.08/x
  3. Step 3: Cross multiply
    30,139.62x = 41,587.62 × 20,083.08
  4. Step 4: Simplify right side
    30,139.62x = 835,207,499.47
  5. Step 5: Solve for x
    x = 835,207,499.47/30,139.62
  6. Step 6: Final answer
    x = 27,711.28

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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.