Home / 28,425.84-39,221.66-20,485.68

Finding the Fourth Proportional to 28,425.84, 39,221.66 and 20,485.68

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Solution

The fourth proportional to 28,425.84, 39,221.66 and 20,485.68 is: 28,265.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,425.84 : 39,221.66 = 20,485.68 : x
  2. Step 2: Convert to fraction form
    28,425.84/39,221.66 = 20,485.68/x
  3. Step 3: Cross multiply
    28,425.84x = 39,221.66 × 20,485.68
  4. Step 4: Simplify right side
    28,425.84x = 803,482,375.83
  5. Step 5: Solve for x
    x = 803,482,375.83/28,425.84
  6. Step 6: Final answer
    x = 28,265.91

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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.