Home / 28,587.80-42,929.22-19,287.65

Finding the Fourth Proportional to 28,587.80, 42,929.22 and 19,287.65

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Solution

The fourth proportional to 28,587.80, 42,929.22 and 19,287.65 is: 28,963.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,587.80 : 42,929.22 = 19,287.65 : x
  2. Step 2: Convert to fraction form
    28,587.80/42,929.22 = 19,287.65/x
  3. Step 3: Cross multiply
    28,587.80x = 42,929.22 × 19,287.65
  4. Step 4: Simplify right side
    28,587.80x = 828,003,770.13
  5. Step 5: Solve for x
    x = 828,003,770.13/28,587.80
  6. Step 6: Final answer
    x = 28,963.54

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.