Home / 28,319.42-39,023.21-21,907.07

Finding the Fourth Proportional to 28,319.42, 39,023.21 and 21,907.07

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Solution

The fourth proportional to 28,319.42, 39,023.21 and 21,907.07 is: 30,187.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,319.42 : 39,023.21 = 21,907.07 : x
  2. Step 2: Convert to fraction form
    28,319.42/39,023.21 = 21,907.07/x
  3. Step 3: Cross multiply
    28,319.42x = 39,023.21 × 21,907.07
  4. Step 4: Simplify right side
    28,319.42x = 854,884,193.09
  5. Step 5: Solve for x
    x = 854,884,193.09/28,319.42
  6. Step 6: Final answer
    x = 30,187.21

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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.