Home / 28,734.65-39,631.32-19,665.38

Finding the Fourth Proportional to 28,734.65, 39,631.32 and 19,665.38

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Solution

The fourth proportional to 28,734.65, 39,631.32 and 19,665.38 is: 27,122.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,734.65 : 39,631.32 = 19,665.38 : x
  2. Step 2: Convert to fraction form
    28,734.65/39,631.32 = 19,665.38/x
  3. Step 3: Cross multiply
    28,734.65x = 39,631.32 × 19,665.38
  4. Step 4: Simplify right side
    28,734.65x = 779,364,967.70
  5. Step 5: Solve for x
    x = 779,364,967.70/28,734.65
  6. Step 6: Final answer
    x = 27,122.83

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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.