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Finding the Fourth Proportional to 29,971.40, 44,870.70 and 20,121.80

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Solution

The fourth proportional to 29,971.40, 44,870.70 and 20,121.80 is: 30,124.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,971.40 : 44,870.70 = 20,121.80 : x
  2. Step 2: Convert to fraction form
    29,971.40/44,870.70 = 20,121.80/x
  3. Step 3: Cross multiply
    29,971.40x = 44,870.70 × 20,121.80
  4. Step 4: Simplify right side
    29,971.40x = 902,879,251.26
  5. Step 5: Solve for x
    x = 902,879,251.26/29,971.40
  6. Step 6: Final answer
    x = 30,124.69

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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.