Home / 20,562.51-28,376.40-11,131.09

Finding the Fourth Proportional to 20,562.51, 28,376.40 and 11,131.09

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Solution

The fourth proportional to 20,562.51, 28,376.40 and 11,131.09 is: 15,360.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,562.51 : 28,376.40 = 11,131.09 : x
  2. Step 2: Convert to fraction form
    20,562.51/28,376.40 = 11,131.09/x
  3. Step 3: Cross multiply
    20,562.51x = 28,376.40 × 11,131.09
  4. Step 4: Simplify right side
    20,562.51x = 315,860,262.28
  5. Step 5: Solve for x
    x = 315,860,262.28/20,562.51
  6. Step 6: Final answer
    x = 15,360.98

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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.