Home / 20,698.67-28,570.20-13,529.63

Finding the Fourth Proportional to 20,698.67, 28,570.20 and 13,529.63

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Solution

The fourth proportional to 20,698.67, 28,570.20 and 13,529.63 is: 18,674.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,698.67 : 28,570.20 = 13,529.63 : x
  2. Step 2: Convert to fraction form
    20,698.67/28,570.20 = 13,529.63/x
  3. Step 3: Cross multiply
    20,698.67x = 28,570.20 × 13,529.63
  4. Step 4: Simplify right side
    20,698.67x = 386,544,235.03
  5. Step 5: Solve for x
    x = 386,544,235.03/20,698.67
  6. Step 6: Final answer
    x = 18,674.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.