Home / 28,378.56-39,162.43-15,803.31

Finding the Fourth Proportional to 28,378.56, 39,162.43 and 15,803.31

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Solution

The fourth proportional to 28,378.56, 39,162.43 and 15,803.31 is: 21,808.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,378.56 : 39,162.43 = 15,803.31 : x
  2. Step 2: Convert to fraction form
    28,378.56/39,162.43 = 15,803.31/x
  3. Step 3: Cross multiply
    28,378.56x = 39,162.43 × 15,803.31
  4. Step 4: Simplify right side
    28,378.56x = 618,896,021.64
  5. Step 5: Solve for x
    x = 618,896,021.64/28,378.56
  6. Step 6: Final answer
    x = 21,808.58

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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.