Home / 28,314.12-39,072.06-15,738.60

Finding the Fourth Proportional to 28,314.12, 39,072.06 and 15,738.60

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Solution

The fourth proportional to 28,314.12, 39,072.06 and 15,738.60 is: 21,718.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,314.12 : 39,072.06 = 15,738.60 : x
  2. Step 2: Convert to fraction form
    28,314.12/39,072.06 = 15,738.60/x
  3. Step 3: Cross multiply
    28,314.12x = 39,072.06 × 15,738.60
  4. Step 4: Simplify right side
    28,314.12x = 614,939,523.52
  5. Step 5: Solve for x
    x = 614,939,523.52/28,314.12
  6. Step 6: Final answer
    x = 21,718.48

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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.