Home / 28,438.50-42,573.48-21,075.99

Finding the Fourth Proportional to 28,438.50, 42,573.48 and 21,075.99

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Solution

The fourth proportional to 28,438.50, 42,573.48 and 21,075.99 is: 31,551.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,438.50 : 42,573.48 = 21,075.99 : x
  2. Step 2: Convert to fraction form
    28,438.50/42,573.48 = 21,075.99/x
  3. Step 3: Cross multiply
    28,438.50x = 42,573.48 × 21,075.99
  4. Step 4: Simplify right side
    28,438.50x = 897,278,238.75
  5. Step 5: Solve for x
    x = 897,278,238.75/28,438.50
  6. Step 6: Final answer
    x = 31,551.53

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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.