Home / 28,365.95-39,144.62-15,790.70

Finding the Fourth Proportional to 28,365.95, 39,144.62 and 15,790.70

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Solution

The fourth proportional to 28,365.95, 39,144.62 and 15,790.70 is: 21,790.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,365.95 : 39,144.62 = 15,790.70 : x
  2. Step 2: Convert to fraction form
    28,365.95/39,144.62 = 15,790.70/x
  3. Step 3: Cross multiply
    28,365.95x = 39,144.62 × 15,790.70
  4. Step 4: Simplify right side
    28,365.95x = 618,121,088.37
  5. Step 5: Solve for x
    x = 618,121,088.37/28,365.95
  6. Step 6: Final answer
    x = 21,790.95

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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.