Home / 21,029.76-31,488.48-18,538.56

Finding the Fourth Proportional to 21,029.76, 31,488.48 and 18,538.56

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Solution

The fourth proportional to 21,029.76, 31,488.48 and 18,538.56 is: 27,758.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,029.76 : 31,488.48 = 18,538.56 : x
  2. Step 2: Convert to fraction form
    21,029.76/31,488.48 = 18,538.56/x
  3. Step 3: Cross multiply
    21,029.76x = 31,488.48 × 18,538.56
  4. Step 4: Simplify right side
    21,029.76x = 583,751,075.79
  5. Step 5: Solve for x
    x = 583,751,075.79/21,029.76
  6. Step 6: Final answer
    x = 27,758.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.