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Finding the Fourth Proportional to 18,907.78, 28,349.52 and 9,046.84

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Solution

The fourth proportional to 18,907.78, 28,349.52 and 9,046.84 is: 13,564.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,907.78 : 28,349.52 = 9,046.84 : x
  2. Step 2: Convert to fraction form
    18,907.78/28,349.52 = 9,046.84/x
  3. Step 3: Cross multiply
    18,907.78x = 28,349.52 × 9,046.84
  4. Step 4: Simplify right side
    18,907.78x = 256,473,571.52
  5. Step 5: Solve for x
    x = 256,473,571.52/18,907.78
  6. Step 6: Final answer
    x = 13,564.45

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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.