Home / 20,122.40-30,187.65-16,858.10

Finding the Fourth Proportional to 20,122.40, 30,187.65 and 16,858.10

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Solution

The fourth proportional to 20,122.40, 30,187.65 and 16,858.10 is: 25,290.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,122.40 : 30,187.65 = 16,858.10 : x
  2. Step 2: Convert to fraction form
    20,122.40/30,187.65 = 16,858.10/x
  3. Step 3: Cross multiply
    20,122.40x = 30,187.65 × 16,858.10
  4. Step 4: Simplify right side
    20,122.40x = 508,906,422.47
  5. Step 5: Solve for x
    x = 508,906,422.47/20,122.40
  6. Step 6: Final answer
    x = 25,290.54

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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.