Home / 28,390.70-39,137.15-18,180.65

Finding the Fourth Proportional to 28,390.70, 39,137.15 and 18,180.65

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Solution

The fourth proportional to 28,390.70, 39,137.15 and 18,180.65 is: 25,062.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,390.70 : 39,137.15 = 18,180.65 : x
  2. Step 2: Convert to fraction form
    28,390.70/39,137.15 = 18,180.65/x
  3. Step 3: Cross multiply
    28,390.70x = 39,137.15 × 18,180.65
  4. Step 4: Simplify right side
    28,390.70x = 711,538,539.56
  5. Step 5: Solve for x
    x = 711,538,539.56/28,390.70
  6. Step 6: Final answer
    x = 25,062.39

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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.