Home / 20,853.32-28,777.31-11,421.89

Finding the Fourth Proportional to 20,853.32, 28,777.31 and 11,421.89

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Solution

The fourth proportional to 20,853.32, 28,777.31 and 11,421.89 is: 15,762.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,853.32 : 28,777.31 = 11,421.89 : x
  2. Step 2: Convert to fraction form
    20,853.32/28,777.31 = 11,421.89/x
  3. Step 3: Cross multiply
    20,853.32x = 28,777.31 × 11,421.89
  4. Step 4: Simplify right side
    20,853.32x = 328,691,212.21
  5. Step 5: Solve for x
    x = 328,691,212.21/20,853.32
  6. Step 6: Final answer
    x = 15,762.06

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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.