Home / 12,172.50-18,258.75-2,938.50

Finding the Fourth Proportional to 12,172.50, 18,258.75 and 2,938.50

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Solution

The fourth proportional to 12,172.50, 18,258.75 and 2,938.50 is: 4,407.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,172.50 : 18,258.75 = 2,938.50 : x
  2. Step 2: Convert to fraction form
    12,172.50/18,258.75 = 2,938.50/x
  3. Step 3: Cross multiply
    12,172.50x = 18,258.75 × 2,938.50
  4. Step 4: Simplify right side
    12,172.50x = 53,653,336.88
  5. Step 5: Solve for x
    x = 53,653,336.88/12,172.50
  6. Step 6: Final answer
    x = 4,407.75

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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.