Home / 30,189.76-41,653.44-18,870.78

Finding the Fourth Proportional to 30,189.76, 41,653.44 and 18,870.78

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Solution

The fourth proportional to 30,189.76, 41,653.44 and 18,870.78 is: 26,036.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,189.76 : 41,653.44 = 18,870.78 : x
  2. Step 2: Convert to fraction form
    30,189.76/41,653.44 = 18,870.78/x
  3. Step 3: Cross multiply
    30,189.76x = 41,653.44 × 18,870.78
  4. Step 4: Simplify right side
    30,189.76x = 786,032,694.22
  5. Step 5: Solve for x
    x = 786,032,694.22/30,189.76
  6. Step 6: Final answer
    x = 26,036.40

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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.