Home / 28,129.72-38,783.73-18,040.36

Finding the Fourth Proportional to 28,129.72, 38,783.73 and 18,040.36

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Solution

The fourth proportional to 28,129.72, 38,783.73 and 18,040.36 is: 24,873.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,129.72 : 38,783.73 = 18,040.36 : x
  2. Step 2: Convert to fraction form
    28,129.72/38,783.73 = 18,040.36/x
  3. Step 3: Cross multiply
    28,129.72x = 38,783.73 × 18,040.36
  4. Step 4: Simplify right side
    28,129.72x = 699,672,451.34
  5. Step 5: Solve for x
    x = 699,672,451.34/28,129.72
  6. Step 6: Final answer
    x = 24,873.07

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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.