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Finding the Fourth Proportional to 28,364.20, 39,768.20 and 28,364.20

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Solution

The fourth proportional to 28,364.20, 39,768.20 and 28,364.20 is: 39,768.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,364.20 : 39,768.20 = 28,364.20 : x
  2. Step 2: Convert to fraction form
    28,364.20/39,768.20 = 28,364.20/x
  3. Step 3: Cross multiply
    28,364.20x = 39,768.20 × 28,364.20
  4. Step 4: Simplify right side
    28,364.20x = 1,127,993,178.44
  5. Step 5: Solve for x
    x = 1,127,993,178.44/28,364.20
  6. Step 6: Final answer
    x = 39,768.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.