Home / 28,399.46-39,190.74-15,478.84

Finding the Fourth Proportional to 28,399.46, 39,190.74 and 15,478.84

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Solution

The fourth proportional to 28,399.46, 39,190.74 and 15,478.84 is: 21,360.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,399.46 : 39,190.74 = 15,478.84 : x
  2. Step 2: Convert to fraction form
    28,399.46/39,190.74 = 15,478.84/x
  3. Step 3: Cross multiply
    28,399.46x = 39,190.74 × 15,478.84
  4. Step 4: Simplify right side
    28,399.46x = 606,627,193.94
  5. Step 5: Solve for x
    x = 606,627,193.94/28,399.46
  6. Step 6: Final answer
    x = 21,360.52

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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.