Home / 30,281.45-45,445.97-20,986.81

Finding the Fourth Proportional to 30,281.45, 45,445.97 and 20,986.81

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Solution

The fourth proportional to 30,281.45, 45,445.97 and 20,986.81 is: 31,496.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,281.45 : 45,445.97 = 20,986.81 : x
  2. Step 2: Convert to fraction form
    30,281.45/45,445.97 = 20,986.81/x
  3. Step 3: Cross multiply
    30,281.45x = 45,445.97 × 20,986.81
  4. Step 4: Simplify right side
    30,281.45x = 953,765,969.93
  5. Step 5: Solve for x
    x = 953,765,969.93/30,281.45
  6. Step 6: Final answer
    x = 31,496.71

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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.