Home / 21,860.07-30,152.82-12,907.03

Finding the Fourth Proportional to 21,860.07, 30,152.82 and 12,907.03

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Solution

The fourth proportional to 21,860.07, 30,152.82 and 12,907.03 is: 17,803.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,860.07 : 30,152.82 = 12,907.03 : x
  2. Step 2: Convert to fraction form
    21,860.07/30,152.82 = 12,907.03/x
  3. Step 3: Cross multiply
    21,860.07x = 30,152.82 × 12,907.03
  4. Step 4: Simplify right side
    21,860.07x = 389,183,352.32
  5. Step 5: Solve for x
    x = 389,183,352.32/21,860.07
  6. Step 6: Final answer
    x = 17,803.39

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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.