Home / 12,912.28-19,368.46-9,216.28

Finding the Fourth Proportional to 12,912.28, 19,368.46 and 9,216.28

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Solution

The fourth proportional to 12,912.28, 19,368.46 and 9,216.28 is: 13,824.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,912.28 : 19,368.46 = 9,216.28 : x
  2. Step 2: Convert to fraction form
    12,912.28/19,368.46 = 9,216.28/x
  3. Step 3: Cross multiply
    12,912.28x = 19,368.46 × 9,216.28
  4. Step 4: Simplify right side
    12,912.28x = 178,505,150.53
  5. Step 5: Solve for x
    x = 178,505,150.53/12,912.28
  6. Step 6: Final answer
    x = 13,824.45

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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.