Home / 28,890.72-39,902.10-19,442.88

Finding the Fourth Proportional to 28,890.72, 39,902.10 and 19,442.88

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Solution

The fourth proportional to 28,890.72, 39,902.10 and 19,442.88 is: 26,853.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,890.72 : 39,902.10 = 19,442.88 : x
  2. Step 2: Convert to fraction form
    28,890.72/39,902.10 = 19,442.88/x
  3. Step 3: Cross multiply
    28,890.72x = 39,902.10 × 19,442.88
  4. Step 4: Simplify right side
    28,890.72x = 775,811,742.05
  5. Step 5: Solve for x
    x = 775,811,742.05/28,890.72
  6. Step 6: Final answer
    x = 26,853.32

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Half scale
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Double scale
Find fourth proportional to 28,891.72, 39,903.48 and 19,443.88
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.