Home / 28,557.03-39,409.49-15,981.78

Finding the Fourth Proportional to 28,557.03, 39,409.49 and 15,981.78

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Solution

The fourth proportional to 28,557.03, 39,409.49 and 15,981.78 is: 22,055.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,557.03 : 39,409.49 = 15,981.78 : x
  2. Step 2: Convert to fraction form
    28,557.03/39,409.49 = 15,981.78/x
  3. Step 3: Cross multiply
    28,557.03x = 39,409.49 × 15,981.78
  4. Step 4: Simplify right side
    28,557.03x = 629,833,799.09
  5. Step 5: Solve for x
    x = 629,833,799.09/28,557.03
  6. Step 6: Final answer
    x = 22,055.30

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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.