Home / 27,980.96-38,613.60-15,405.70

Finding the Fourth Proportional to 27,980.96, 38,613.60 and 15,405.70

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Solution

The fourth proportional to 27,980.96, 38,613.60 and 15,405.70 is: 21,259.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,980.96 : 38,613.60 = 15,405.70 : x
  2. Step 2: Convert to fraction form
    27,980.96/38,613.60 = 15,405.70/x
  3. Step 3: Cross multiply
    27,980.96x = 38,613.60 × 15,405.70
  4. Step 4: Simplify right side
    27,980.96x = 594,869,537.52
  5. Step 5: Solve for x
    x = 594,869,537.52/27,980.96
  6. Step 6: Final answer
    x = 21,259.80

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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.