Home / 28,384.07-39,169.53-15,638.45

Finding the Fourth Proportional to 28,384.07, 39,169.53 and 15,638.45

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Solution

The fourth proportional to 28,384.07, 39,169.53 and 15,638.45 is: 21,580.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,384.07 : 39,169.53 = 15,638.45 : x
  2. Step 2: Convert to fraction form
    28,384.07/39,169.53 = 15,638.45/x
  3. Step 3: Cross multiply
    28,384.07x = 39,169.53 × 15,638.45
  4. Step 4: Simplify right side
    28,384.07x = 612,550,540.58
  5. Step 5: Solve for x
    x = 612,550,540.58/28,384.07
  6. Step 6: Final answer
    x = 21,580.79

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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.