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Finding the Fourth Proportional to 12,221.58, 16,862.85 and 7,185.54

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Solution

The fourth proportional to 12,221.58, 16,862.85 and 7,185.54 is: 9,914.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,221.58 : 16,862.85 = 7,185.54 : x
  2. Step 2: Convert to fraction form
    12,221.58/16,862.85 = 7,185.54/x
  3. Step 3: Cross multiply
    12,221.58x = 16,862.85 × 7,185.54
  4. Step 4: Simplify right side
    12,221.58x = 121,168,683.19
  5. Step 5: Solve for x
    x = 121,168,683.19/12,221.58
  6. Step 6: Final answer
    x = 9,914.32

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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.