Home / 28,457.26-42,651.33-20,139.70

Finding the Fourth Proportional to 28,457.26, 42,651.33 and 20,139.70

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Solution

The fourth proportional to 28,457.26, 42,651.33 and 20,139.70 is: 30,185.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,457.26 : 42,651.33 = 20,139.70 : x
  2. Step 2: Convert to fraction form
    28,457.26/42,651.33 = 20,139.70/x
  3. Step 3: Cross multiply
    28,457.26x = 42,651.33 × 20,139.70
  4. Step 4: Simplify right side
    28,457.26x = 858,984,990.80
  5. Step 5: Solve for x
    x = 858,984,990.80/28,457.26
  6. Step 6: Final answer
    x = 30,185.09

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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.