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Finding the Fourth Proportional to 28,757, 43,135.52 and 7,980.52

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Solution

The fourth proportional to 28,757, 43,135.52 and 7,980.52 is: 11,970.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,757 : 43,135.52 = 7,980.52 : x
  2. Step 2: Convert to fraction form
    28,757/43,135.52 = 7,980.52/x
  3. Step 3: Cross multiply
    28,757x = 43,135.52 × 7,980.52
  4. Step 4: Simplify right side
    28,757x = 344,243,880.07
  5. Step 5: Solve for x
    x = 344,243,880.07/28,757
  6. Step 6: Final answer
    x = 11,970.79

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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.