Home / 27,979.22-38,613.33-15,715.62

Finding the Fourth Proportional to 27,979.22, 38,613.33 and 15,715.62

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Solution

The fourth proportional to 27,979.22, 38,613.33 and 15,715.62 is: 21,688.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,979.22 : 38,613.33 = 15,715.62 : x
  2. Step 2: Convert to fraction form
    27,979.22/38,613.33 = 15,715.62/x
  3. Step 3: Cross multiply
    27,979.22x = 38,613.33 × 15,715.62
  4. Step 4: Simplify right side
    27,979.22x = 606,832,342.64
  5. Step 5: Solve for x
    x = 606,832,342.64/27,979.22
  6. Step 6: Final answer
    x = 21,688.68

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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.