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Finding the Fourth Proportional to 18,907.06, 28,360.59 and 7,801.54

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Solution

The fourth proportional to 18,907.06, 28,360.59 and 7,801.54 is: 11,702.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,907.06 : 28,360.59 = 7,801.54 : x
  2. Step 2: Convert to fraction form
    18,907.06/28,360.59 = 7,801.54/x
  3. Step 3: Cross multiply
    18,907.06x = 28,360.59 × 7,801.54
  4. Step 4: Simplify right side
    18,907.06x = 221,256,277.31
  5. Step 5: Solve for x
    x = 221,256,277.31/18,907.06
  6. Step 6: Final answer
    x = 11,702.31

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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.