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Finding the Fourth Proportional to 28,884.56, 39,869 and 16,948.40

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Solution

The fourth proportional to 28,884.56, 39,869 and 16,948.40 is: 23,393.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,884.56 : 39,869 = 16,948.40 : x
  2. Step 2: Convert to fraction form
    28,884.56/39,869 = 16,948.40/x
  3. Step 3: Cross multiply
    28,884.56x = 39,869 × 16,948.40
  4. Step 4: Simplify right side
    28,884.56x = 675,715,759.60
  5. Step 5: Solve for x
    x = 675,715,759.60/28,884.56
  6. Step 6: Final answer
    x = 23,393.67

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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.