Home / 28,131.21-38,809.40-18,057.51

Finding the Fourth Proportional to 28,131.21, 38,809.40 and 18,057.51

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Solution

The fourth proportional to 28,131.21, 38,809.40 and 18,057.51 is: 24,911.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,131.21 : 38,809.40 = 18,057.51 : x
  2. Step 2: Convert to fraction form
    28,131.21/38,809.40 = 18,057.51/x
  3. Step 3: Cross multiply
    28,131.21x = 38,809.40 × 18,057.51
  4. Step 4: Simplify right side
    28,131.21x = 700,801,038.31
  5. Step 5: Solve for x
    x = 700,801,038.31/28,131.21
  6. Step 6: Final answer
    x = 24,911.87

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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.