Home / 20,415.06-28,172.07-12,470.58

Finding the Fourth Proportional to 20,415.06, 28,172.07 and 12,470.58

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Solution

The fourth proportional to 20,415.06, 28,172.07 and 12,470.58 is: 17,208.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,415.06 : 28,172.07 = 12,470.58 : x
  2. Step 2: Convert to fraction form
    20,415.06/28,172.07 = 12,470.58/x
  3. Step 3: Cross multiply
    20,415.06x = 28,172.07 × 12,470.58
  4. Step 4: Simplify right side
    20,415.06x = 351,322,052.70
  5. Step 5: Solve for x
    x = 351,322,052.70/20,415.06
  6. Step 6: Final answer
    x = 17,208.96

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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.