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Finding the Fourth Proportional to 28,912.58, 43,336.98 and 18,913.17

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Solution

The fourth proportional to 28,912.58, 43,336.98 and 18,913.17 is: 28,348.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,912.58 : 43,336.98 = 18,913.17 : x
  2. Step 2: Convert to fraction form
    28,912.58/43,336.98 = 18,913.17/x
  3. Step 3: Cross multiply
    28,912.58x = 43,336.98 × 18,913.17
  4. Step 4: Simplify right side
    28,912.58x = 819,639,670.03
  5. Step 5: Solve for x
    x = 819,639,670.03/28,912.58
  6. Step 6: Final answer
    x = 28,348.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.