Home / 21,912.04-30,236.94-12,478.72

Finding the Fourth Proportional to 21,912.04, 30,236.94 and 12,478.72

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Solution

The fourth proportional to 21,912.04, 30,236.94 and 12,478.72 is: 17,219.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,912.04 : 30,236.94 = 12,478.72 : x
  2. Step 2: Convert to fraction form
    21,912.04/30,236.94 = 12,478.72/x
  3. Step 3: Cross multiply
    21,912.04x = 30,236.94 × 12,478.72
  4. Step 4: Simplify right side
    21,912.04x = 377,318,307.92
  5. Step 5: Solve for x
    x = 377,318,307.92/21,912.04
  6. Step 6: Final answer
    x = 17,219.68

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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.