Home / 20,210.85-30,325.89-9,120.93

Finding the Fourth Proportional to 20,210.85, 30,325.89 and 9,120.93

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Solution

The fourth proportional to 20,210.85, 30,325.89 and 9,120.93 is: 13,685.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,210.85 : 30,325.89 = 9,120.93 : x
  2. Step 2: Convert to fraction form
    20,210.85/30,325.89 = 9,120.93/x
  3. Step 3: Cross multiply
    20,210.85x = 30,325.89 × 9,120.93
  4. Step 4: Simplify right side
    20,210.85x = 276,600,319.88
  5. Step 5: Solve for x
    x = 276,600,319.88/20,210.85
  6. Step 6: Final answer
    x = 13,685.73

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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.