Home / 18,858.09-28,290.78-7,170.40

Finding the Fourth Proportional to 18,858.09, 28,290.78 and 7,170.40

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Solution

The fourth proportional to 18,858.09, 28,290.78 and 7,170.40 is: 10,756.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,858.09 : 28,290.78 = 7,170.40 : x
  2. Step 2: Convert to fraction form
    18,858.09/28,290.78 = 7,170.40/x
  3. Step 3: Cross multiply
    18,858.09x = 28,290.78 × 7,170.40
  4. Step 4: Simplify right side
    18,858.09x = 202,856,031.61
  5. Step 5: Solve for x
    x = 202,856,031.61/18,858.09
  6. Step 6: Final answer
    x = 10,756.98

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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.