Home / 28,449.40-42,639.48-20,131.81

Finding the Fourth Proportional to 28,449.40, 42,639.48 and 20,131.81

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Solution

The fourth proportional to 28,449.40, 42,639.48 and 20,131.81 is: 30,173.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,449.40 : 42,639.48 = 20,131.81 : x
  2. Step 2: Convert to fraction form
    28,449.40/42,639.48 = 20,131.81/x
  3. Step 3: Cross multiply
    28,449.40x = 42,639.48 × 20,131.81
  4. Step 4: Simplify right side
    28,449.40x = 858,409,909.86
  5. Step 5: Solve for x
    x = 858,409,909.86/28,449.40
  6. Step 6: Final answer
    x = 30,173.22

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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.