Home / 15,879.42-21,939.93-12,547.80

Finding the Fourth Proportional to 15,879.42, 21,939.93 and 12,547.80

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Solution

The fourth proportional to 15,879.42, 21,939.93 and 12,547.80 is: 17,336.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,879.42 : 21,939.93 = 12,547.80 : x
  2. Step 2: Convert to fraction form
    15,879.42/21,939.93 = 12,547.80/x
  3. Step 3: Cross multiply
    15,879.42x = 21,939.93 × 12,547.80
  4. Step 4: Simplify right side
    15,879.42x = 275,297,853.65
  5. Step 5: Solve for x
    x = 275,297,853.65/15,879.42
  6. Step 6: Final answer
    x = 17,336.77

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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.