Home / 28,428.71-42,608.46-20,111.12

Finding the Fourth Proportional to 28,428.71, 42,608.46 and 20,111.12

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Solution

The fourth proportional to 28,428.71, 42,608.46 and 20,111.12 is: 30,142.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,428.71 : 42,608.46 = 20,111.12 : x
  2. Step 2: Convert to fraction form
    28,428.71/42,608.46 = 20,111.12/x
  3. Step 3: Cross multiply
    28,428.71x = 42,608.46 × 20,111.12
  4. Step 4: Simplify right side
    28,428.71x = 856,903,874.23
  5. Step 5: Solve for x
    x = 856,903,874.23/28,428.71
  6. Step 6: Final answer
    x = 30,142.21

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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.