Home / 38,485.79-57,730.31-12,189.95

Finding the Fourth Proportional to 38,485.79, 57,730.31 and 12,189.95

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Solution

The fourth proportional to 38,485.79, 57,730.31 and 12,189.95 is: 18,285.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,485.79 : 57,730.31 = 12,189.95 : x
  2. Step 2: Convert to fraction form
    38,485.79/57,730.31 = 12,189.95/x
  3. Step 3: Cross multiply
    38,485.79x = 57,730.31 × 12,189.95
  4. Step 4: Simplify right side
    38,485.79x = 703,729,721.47
  5. Step 5: Solve for x
    x = 703,729,721.47/38,485.79
  6. Step 6: Final answer
    x = 18,285.44

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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.