Home / 20,771.34-28,663.65-11,339.97

Finding the Fourth Proportional to 20,771.34, 28,663.65 and 11,339.97

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Solution

The fourth proportional to 20,771.34, 28,663.65 and 11,339.97 is: 15,648.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,771.34 : 28,663.65 = 11,339.97 : x
  2. Step 2: Convert to fraction form
    20,771.34/28,663.65 = 11,339.97/x
  3. Step 3: Cross multiply
    20,771.34x = 28,663.65 × 11,339.97
  4. Step 4: Simplify right side
    20,771.34x = 325,044,931.09
  5. Step 5: Solve for x
    x = 325,044,931.09/20,771.34
  6. Step 6: Final answer
    x = 15,648.72

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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.