Home / 12,072.08-16,636.88-9,415.28

Finding the Fourth Proportional to 12,072.08, 16,636.88 and 9,415.28

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Solution

The fourth proportional to 12,072.08, 16,636.88 and 9,415.28 is: 12,975.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,072.08 : 16,636.88 = 9,415.28 : x
  2. Step 2: Convert to fraction form
    12,072.08/16,636.88 = 9,415.28/x
  3. Step 3: Cross multiply
    12,072.08x = 16,636.88 × 9,415.28
  4. Step 4: Simplify right side
    12,072.08x = 156,640,883.53
  5. Step 5: Solve for x
    x = 156,640,883.53/12,072.08
  6. Step 6: Final answer
    x = 12,975.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.