Home / 28,478.09-42,709.07-11,817.52

Finding the Fourth Proportional to 28,478.09, 42,709.07 and 11,817.52

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Solution

The fourth proportional to 28,478.09, 42,709.07 and 11,817.52 is: 17,722.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,478.09 : 42,709.07 = 11,817.52 : x
  2. Step 2: Convert to fraction form
    28,478.09/42,709.07 = 11,817.52/x
  3. Step 3: Cross multiply
    28,478.09x = 42,709.07 × 11,817.52
  4. Step 4: Simplify right side
    28,478.09x = 504,715,211.68
  5. Step 5: Solve for x
    x = 504,715,211.68/28,478.09
  6. Step 6: Final answer
    x = 17,722.93

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1.5x scale

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.