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Finding the Fourth Proportional to 8,638.95, 12,954.33 and 4,940.19

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Solution

The fourth proportional to 8,638.95, 12,954.33 and 4,940.19 is: 7,407.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,638.95 : 12,954.33 = 4,940.19 : x
  2. Step 2: Convert to fraction form
    8,638.95/12,954.33 = 4,940.19/x
  3. Step 3: Cross multiply
    8,638.95x = 12,954.33 × 4,940.19
  4. Step 4: Simplify right side
    8,638.95x = 63,996,851.52
  5. Step 5: Solve for x
    x = 63,996,851.52/8,638.95
  6. Step 6: Final answer
    x = 7,407.94

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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.