Home / 28,378.22-39,161.57-15,631.16

Finding the Fourth Proportional to 28,378.22, 39,161.57 and 15,631.16

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Solution

The fourth proportional to 28,378.22, 39,161.57 and 15,631.16 is: 21,570.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,378.22 : 39,161.57 = 15,631.16 : x
  2. Step 2: Convert to fraction form
    28,378.22/39,161.57 = 15,631.16/x
  3. Step 3: Cross multiply
    28,378.22x = 39,161.57 × 15,631.16
  4. Step 4: Simplify right side
    28,378.22x = 612,140,766.52
  5. Step 5: Solve for x
    x = 612,140,766.52/28,378.22
  6. Step 6: Final answer
    x = 21,570.80

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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.