Home / 28,557.31-39,409.14-15,811.38

Finding the Fourth Proportional to 28,557.31, 39,409.14 and 15,811.38

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Solution

The fourth proportional to 28,557.31, 39,409.14 and 15,811.38 is: 21,819.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,557.31 : 39,409.14 = 15,811.38 : x
  2. Step 2: Convert to fraction form
    28,557.31/39,409.14 = 15,811.38/x
  3. Step 3: Cross multiply
    28,557.31x = 39,409.14 × 15,811.38
  4. Step 4: Simplify right side
    28,557.31x = 623,112,888.01
  5. Step 5: Solve for x
    x = 623,112,888.01/28,557.31
  6. Step 6: Final answer
    x = 21,819.73

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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.