Home / 28,515.58-39,351.76-15,769.63

Finding the Fourth Proportional to 28,515.58, 39,351.76 and 15,769.63

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Solution

The fourth proportional to 28,515.58, 39,351.76 and 15,769.63 is: 21,762.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,515.58 : 39,351.76 = 15,769.63 : x
  2. Step 2: Convert to fraction form
    28,515.58/39,351.76 = 15,769.63/x
  3. Step 3: Cross multiply
    28,515.58x = 39,351.76 × 15,769.63
  4. Step 4: Simplify right side
    28,515.58x = 620,562,419.44
  5. Step 5: Solve for x
    x = 620,562,419.44/28,515.58
  6. Step 6: Final answer
    x = 21,762.22

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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.