Home / 20,121.40-30,182.10-16,840.90

Finding the Fourth Proportional to 20,121.40, 30,182.10 and 16,840.90

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Solution

The fourth proportional to 20,121.40, 30,182.10 and 16,840.90 is: 25,261.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,121.40 : 30,182.10 = 16,840.90 : x
  2. Step 2: Convert to fraction form
    20,121.40/30,182.10 = 16,840.90/x
  3. Step 3: Cross multiply
    20,121.40x = 30,182.10 × 16,840.90
  4. Step 4: Simplify right side
    20,121.40x = 508,293,727.89
  5. Step 5: Solve for x
    x = 508,293,727.89/20,121.40
  6. Step 6: Final answer
    x = 25,261.35

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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.