Home / 30,439.70-45,663.20-12,907.25

Finding the Fourth Proportional to 30,439.70, 45,663.20 and 12,907.25

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Solution

The fourth proportional to 30,439.70, 45,663.20 and 12,907.25 is: 19,362.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,439.70 : 45,663.20 = 12,907.25 : x
  2. Step 2: Convert to fraction form
    30,439.70/45,663.20 = 12,907.25/x
  3. Step 3: Cross multiply
    30,439.70x = 45,663.20 × 12,907.25
  4. Step 4: Simplify right side
    30,439.70x = 589,386,273.66
  5. Step 5: Solve for x
    x = 589,386,273.66/30,439.70
  6. Step 6: Final answer
    x = 19,362.42

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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.