Home / 28,441.72-39,228.40-20,885.68

Finding the Fourth Proportional to 28,441.72, 39,228.40 and 20,885.68

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Solution

The fourth proportional to 28,441.72, 39,228.40 and 20,885.68 is: 28,806.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,441.72 : 39,228.40 = 20,885.68 : x
  2. Step 2: Convert to fraction form
    28,441.72/39,228.40 = 20,885.68/x
  3. Step 3: Cross multiply
    28,441.72x = 39,228.40 × 20,885.68
  4. Step 4: Simplify right side
    28,441.72x = 819,311,809.31
  5. Step 5: Solve for x
    x = 819,311,809.31/28,441.72
  6. Step 6: Final answer
    x = 28,806.69

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Half scale
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Double scale
Find fourth proportional to 28,442.72, 39,229.78 and 20,886.68
Similar ratio
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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.