Home / 20,081,286.80-30,121,930.20-18,695,603.60

Finding the Fourth Proportional to 20,081,286.80, 30,121,930.20 and 18,695,603.60

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Solution

The fourth proportional to 20,081,286.80, 30,121,930.20 and 18,695,603.60 is: 28,043,405.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,081,286.80 : 30,121,930.20 = 18,695,603.60 : x
  2. Step 2: Convert to fraction form
    20,081,286.80/30,121,930.20 = 18,695,603.60/x
  3. Step 3: Cross multiply
    20,081,286.80x = 30,121,930.20 × 18,695,603.60
  4. Step 4: Simplify right side
    20,081,286.80x = 563,147,666,686,068.75
  5. Step 5: Solve for x
    x = 563,147,666,686,068.75/20,081,286.80
  6. Step 6: Final answer
    x = 28,043,405.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.