Home / 27,709.56-38,189.75-20,979.06

Finding the Fourth Proportional to 27,709.56, 38,189.75 and 20,979.06

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Solution

The fourth proportional to 27,709.56, 38,189.75 and 20,979.06 is: 28,913.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,709.56 : 38,189.75 = 20,979.06 : x
  2. Step 2: Convert to fraction form
    27,709.56/38,189.75 = 20,979.06/x
  3. Step 3: Cross multiply
    27,709.56x = 38,189.75 × 20,979.06
  4. Step 4: Simplify right side
    27,709.56x = 801,184,951.74
  5. Step 5: Solve for x
    x = 801,184,951.74/27,709.56
  6. Step 6: Final answer
    x = 28,913.67

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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.