Home / 28,911.32-39,904.29-18,822.20

Finding the Fourth Proportional to 28,911.32, 39,904.29 and 18,822.20

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Solution

The fourth proportional to 28,911.32, 39,904.29 and 18,822.20 is: 25,978.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,911.32 : 39,904.29 = 18,822.20 : x
  2. Step 2: Convert to fraction form
    28,911.32/39,904.29 = 18,822.20/x
  3. Step 3: Cross multiply
    28,911.32x = 39,904.29 × 18,822.20
  4. Step 4: Simplify right side
    28,911.32x = 751,086,327.72
  5. Step 5: Solve for x
    x = 751,086,327.72/28,911.32
  6. Step 6: Final answer
    x = 25,978.97

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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.