Home / 20,698.20-31,047.30-18,235.80

Finding the Fourth Proportional to 20,698.20, 31,047.30 and 18,235.80

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Solution

The fourth proportional to 20,698.20, 31,047.30 and 18,235.80 is: 27,353.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,698.20 : 31,047.30 = 18,235.80 : x
  2. Step 2: Convert to fraction form
    20,698.20/31,047.30 = 18,235.80/x
  3. Step 3: Cross multiply
    20,698.20x = 31,047.30 × 18,235.80
  4. Step 4: Simplify right side
    20,698.20x = 566,172,353.34
  5. Step 5: Solve for x
    x = 566,172,353.34/20,698.20
  6. Step 6: Final answer
    x = 27,353.70

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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.