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Finding the Fourth Proportional to 28,955.39, 43,440.39 and 8,178.89

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Solution

The fourth proportional to 28,955.39, 43,440.39 and 8,178.89 is: 12,270.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,955.39 : 43,440.39 = 8,178.89 : x
  2. Step 2: Convert to fraction form
    28,955.39/43,440.39 = 8,178.89/x
  3. Step 3: Cross multiply
    28,955.39x = 43,440.39 × 8,178.89
  4. Step 4: Simplify right side
    28,955.39x = 355,294,171.37
  5. Step 5: Solve for x
    x = 355,294,171.37/28,955.39
  6. Step 6: Final answer
    x = 12,270.40

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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.