Home / 28,719.87-39,631.75-15,972.31

Finding the Fourth Proportional to 28,719.87, 39,631.75 and 15,972.31

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Solution

The fourth proportional to 28,719.87, 39,631.75 and 15,972.31 is: 22,040.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,719.87 : 39,631.75 = 15,972.31 : x
  2. Step 2: Convert to fraction form
    28,719.87/39,631.75 = 15,972.31/x
  3. Step 3: Cross multiply
    28,719.87x = 39,631.75 × 15,972.31
  4. Step 4: Simplify right side
    28,719.87x = 633,010,596.84
  5. Step 5: Solve for x
    x = 633,010,596.84/28,719.87
  6. Step 6: Final answer
    x = 22,040.86

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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.