Home / 30,439.56-41,972.40-19,670.25

Finding the Fourth Proportional to 30,439.56, 41,972.40 and 19,670.25

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Solution

The fourth proportional to 30,439.56, 41,972.40 and 19,670.25 is: 27,122.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,439.56 : 41,972.40 = 19,670.25 : x
  2. Step 2: Convert to fraction form
    30,439.56/41,972.40 = 19,670.25/x
  3. Step 3: Cross multiply
    30,439.56x = 41,972.40 × 19,670.25
  4. Step 4: Simplify right side
    30,439.56x = 825,607,601.10
  5. Step 5: Solve for x
    x = 825,607,601.10/30,439.56
  6. Step 6: Final answer
    x = 27,122.85

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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.