Home / 28,366.91-39,146-15,619.83

Finding the Fourth Proportional to 28,366.91, 39,146 and 15,619.83

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Solution

The fourth proportional to 28,366.91, 39,146 and 15,619.83 is: 21,555.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,366.91 : 39,146 = 15,619.83 : x
  2. Step 2: Convert to fraction form
    28,366.91/39,146 = 15,619.83/x
  3. Step 3: Cross multiply
    28,366.91x = 39,146 × 15,619.83
  4. Step 4: Simplify right side
    28,366.91x = 611,453,865.18
  5. Step 5: Solve for x
    x = 611,453,865.18/28,366.91
  6. Step 6: Final answer
    x = 21,555.18

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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.