Home / 20,853.07-28,776.96-11,421.64

Finding the Fourth Proportional to 20,853.07, 28,776.96 and 11,421.64

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Solution

The fourth proportional to 20,853.07, 28,776.96 and 11,421.64 is: 15,761.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,853.07 : 28,776.96 = 11,421.64 : x
  2. Step 2: Convert to fraction form
    20,853.07/28,776.96 = 11,421.64/x
  3. Step 3: Cross multiply
    20,853.07x = 28,776.96 × 11,421.64
  4. Step 4: Simplify right side
    20,853.07x = 328,680,077.41
  5. Step 5: Solve for x
    x = 328,680,077.41/20,853.07
  6. Step 6: Final answer
    x = 15,761.71

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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.