Home / 28,128.72-38,782.35-18,039.36

Finding the Fourth Proportional to 28,128.72, 38,782.35 and 18,039.36

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Solution

The fourth proportional to 28,128.72, 38,782.35 and 18,039.36 is: 24,871.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,128.72 : 38,782.35 = 18,039.36 : x
  2. Step 2: Convert to fraction form
    28,128.72/38,782.35 = 18,039.36/x
  3. Step 3: Cross multiply
    28,128.72x = 38,782.35 × 18,039.36
  4. Step 4: Simplify right side
    28,128.72x = 699,608,773.30
  5. Step 5: Solve for x
    x = 699,608,773.30/28,128.72
  6. Step 6: Final answer
    x = 24,871.69

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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.