Home / 20,877.19-28,815.96-12,914.77

Finding the Fourth Proportional to 20,877.19, 28,815.96 and 12,914.77

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Solution

The fourth proportional to 20,877.19, 28,815.96 and 12,914.77 is: 17,825.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,877.19 : 28,815.96 = 12,914.77 : x
  2. Step 2: Convert to fraction form
    20,877.19/28,815.96 = 12,914.77/x
  3. Step 3: Cross multiply
    20,877.19x = 28,815.96 × 12,914.77
  4. Step 4: Simplify right side
    20,877.19x = 372,151,495.73
  5. Step 5: Solve for x
    x = 372,151,495.73/20,877.19
  6. Step 6: Final answer
    x = 17,825.75

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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.