Home / 30,143.79-45,206.44-20,843.57

Finding the Fourth Proportional to 30,143.79, 45,206.44 and 20,843.57

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Solution

The fourth proportional to 30,143.79, 45,206.44 and 20,843.57 is: 31,258.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,143.79 : 45,206.44 = 20,843.57 : x
  2. Step 2: Convert to fraction form
    30,143.79/45,206.44 = 20,843.57/x
  3. Step 3: Cross multiply
    30,143.79x = 45,206.44 × 20,843.57
  4. Step 4: Simplify right side
    30,143.79x = 942,263,657.50
  5. Step 5: Solve for x
    x = 942,263,657.50/30,143.79
  6. Step 6: Final answer
    x = 31,258.96

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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.