Home / 27,980.79-38,613.42-15,405.54

Finding the Fourth Proportional to 27,980.79, 38,613.42 and 15,405.54

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Solution

The fourth proportional to 27,980.79, 38,613.42 and 15,405.54 is: 21,259.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,980.79 : 38,613.42 = 15,405.54 : x
  2. Step 2: Convert to fraction form
    27,980.79/38,613.42 = 15,405.54/x
  3. Step 3: Cross multiply
    27,980.79x = 38,613.42 × 15,405.54
  4. Step 4: Simplify right side
    27,980.79x = 594,860,586.35
  5. Step 5: Solve for x
    x = 594,860,586.35/27,980.79
  6. Step 6: Final answer
    x = 21,259.61

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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.