Home / 20,460.87-28,245.96-12,918.15

Finding the Fourth Proportional to 20,460.87, 28,245.96 and 12,918.15

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Solution

The fourth proportional to 20,460.87, 28,245.96 and 12,918.15 is: 17,833.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,460.87 : 28,245.96 = 12,918.15 : x
  2. Step 2: Convert to fraction form
    20,460.87/28,245.96 = 12,918.15/x
  3. Step 3: Cross multiply
    20,460.87x = 28,245.96 × 12,918.15
  4. Step 4: Simplify right side
    20,460.87x = 364,885,548.17
  5. Step 5: Solve for x
    x = 364,885,548.17/20,460.87
  6. Step 6: Final answer
    x = 17,833.33

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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.