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Finding the Fourth Proportional to 18,963.25, 28,444.88 and 5,112.25

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Solution

The fourth proportional to 18,963.25, 28,444.88 and 5,112.25 is: 7,668.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,963.25 : 28,444.88 = 5,112.25 : x
  2. Step 2: Convert to fraction form
    18,963.25/28,444.88 = 5,112.25/x
  3. Step 3: Cross multiply
    18,963.25x = 28,444.88 × 5,112.25
  4. Step 4: Simplify right side
    18,963.25x = 145,417,312.22
  5. Step 5: Solve for x
    x = 145,417,312.22/18,963.25
  6. Step 6: Final answer
    x = 7,668.38

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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.