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Finding the Fourth Proportional to 12,283.55, 16,951.38 and 6,978.45

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Solution

The fourth proportional to 12,283.55, 16,951.38 and 6,978.45 is: 9,630.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,283.55 : 16,951.38 = 6,978.45 : x
  2. Step 2: Convert to fraction form
    12,283.55/16,951.38 = 6,978.45/x
  3. Step 3: Cross multiply
    12,283.55x = 16,951.38 × 6,978.45
  4. Step 4: Simplify right side
    12,283.55x = 118,294,395.16
  5. Step 5: Solve for x
    x = 118,294,395.16/12,283.55
  6. Step 6: Final answer
    x = 9,630.31

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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.