Home / 20,837.84-28,755.72-11,406.80

Finding the Fourth Proportional to 20,837.84, 28,755.72 and 11,406.80

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Solution

The fourth proportional to 20,837.84, 28,755.72 and 11,406.80 is: 15,741.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,837.84 : 28,755.72 = 11,406.80 : x
  2. Step 2: Convert to fraction form
    20,837.84/28,755.72 = 11,406.80/x
  3. Step 3: Cross multiply
    20,837.84x = 28,755.72 × 11,406.80
  4. Step 4: Simplify right side
    20,837.84x = 328,010,746.90
  5. Step 5: Solve for x
    x = 328,010,746.90/20,837.84
  6. Step 6: Final answer
    x = 15,741.11

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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.