Home / 20,935.74-28,866.90-15,621.33

Finding the Fourth Proportional to 20,935.74, 28,866.90 and 15,621.33

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Solution

The fourth proportional to 20,935.74, 28,866.90 and 15,621.33 is: 21,539.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,935.74 : 28,866.90 = 15,621.33 : x
  2. Step 2: Convert to fraction form
    20,935.74/28,866.90 = 15,621.33/x
  3. Step 3: Cross multiply
    20,935.74x = 28,866.90 × 15,621.33
  4. Step 4: Simplify right side
    20,935.74x = 450,939,370.98
  5. Step 5: Solve for x
    x = 450,939,370.98/20,935.74
  6. Step 6: Final answer
    x = 21,539.21

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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.