Home / 28,065.37-38,683.75-19,878.34

Finding the Fourth Proportional to 28,065.37, 38,683.75 and 19,878.34

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Solution

The fourth proportional to 28,065.37, 38,683.75 and 19,878.34 is: 27,399.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,065.37 : 38,683.75 = 19,878.34 : x
  2. Step 2: Convert to fraction form
    28,065.37/38,683.75 = 19,878.34/x
  3. Step 3: Cross multiply
    28,065.37x = 38,683.75 × 19,878.34
  4. Step 4: Simplify right side
    28,065.37x = 768,968,734.98
  5. Step 5: Solve for x
    x = 768,968,734.98/28,065.37
  6. Step 6: Final answer
    x = 27,399.20

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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.