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Finding the Fourth Proportional to 12,719.25, 19,079.01 and 3,485.25

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Solution

The fourth proportional to 12,719.25, 19,079.01 and 3,485.25 is: 5,227.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,719.25 : 19,079.01 = 3,485.25 : x
  2. Step 2: Convert to fraction form
    12,719.25/19,079.01 = 3,485.25/x
  3. Step 3: Cross multiply
    12,719.25x = 19,079.01 × 3,485.25
  4. Step 4: Simplify right side
    12,719.25x = 66,495,119.60
  5. Step 5: Solve for x
    x = 66,495,119.60/12,719.25
  6. Step 6: Final answer
    x = 5,227.91

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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.