Home / 20,137.90-30,206.85-16,857.40

Finding the Fourth Proportional to 20,137.90, 30,206.85 and 16,857.40

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Solution

The fourth proportional to 20,137.90, 30,206.85 and 16,857.40 is: 25,286.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,137.90 : 30,206.85 = 16,857.40 : x
  2. Step 2: Convert to fraction form
    20,137.90/30,206.85 = 16,857.40/x
  3. Step 3: Cross multiply
    20,137.90x = 30,206.85 × 16,857.40
  4. Step 4: Simplify right side
    20,137.90x = 509,208,953.19
  5. Step 5: Solve for x
    x = 509,208,953.19/20,137.90
  6. Step 6: Final answer
    x = 25,286.10

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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.