Home / 27,679.08-38,208.54-20,964.72

Finding the Fourth Proportional to 27,679.08, 38,208.54 and 20,964.72

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Solution

The fourth proportional to 27,679.08, 38,208.54 and 20,964.72 is: 28,939.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,679.08 : 38,208.54 = 20,964.72 : x
  2. Step 2: Convert to fraction form
    27,679.08/38,208.54 = 20,964.72/x
  3. Step 3: Cross multiply
    27,679.08x = 38,208.54 × 20,964.72
  4. Step 4: Simplify right side
    27,679.08x = 801,031,342.71
  5. Step 5: Solve for x
    x = 801,031,342.71/27,679.08
  6. Step 6: Final answer
    x = 28,939.96

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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.