Home / 28,485.54-39,254.55-20,512.71

Finding the Fourth Proportional to 28,485.54, 39,254.55 and 20,512.71

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Solution

The fourth proportional to 28,485.54, 39,254.55 and 20,512.71 is: 28,267.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,485.54 : 39,254.55 = 20,512.71 : x
  2. Step 2: Convert to fraction form
    28,485.54/39,254.55 = 20,512.71/x
  3. Step 3: Cross multiply
    28,485.54x = 39,254.55 × 20,512.71
  4. Step 4: Simplify right side
    28,485.54x = 805,217,200.33
  5. Step 5: Solve for x
    x = 805,217,200.33/28,485.54
  6. Step 6: Final answer
    x = 28,267.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.