Home / 28,378.50-39,162.60-15,803.52

Finding the Fourth Proportional to 28,378.50, 39,162.60 and 15,803.52

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Solution

The fourth proportional to 28,378.50, 39,162.60 and 15,803.52 is: 21,809.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,378.50 : 39,162.60 = 15,803.52 : x
  2. Step 2: Convert to fraction form
    28,378.50/39,162.60 = 15,803.52/x
  3. Step 3: Cross multiply
    28,378.50x = 39,162.60 × 15,803.52
  4. Step 4: Simplify right side
    28,378.50x = 618,906,932.35
  5. Step 5: Solve for x
    x = 618,906,932.35/28,378.50
  6. Step 6: Final answer
    x = 21,809.01

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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.