Home / 20,079.86-30,121.27-5,288.67

Finding the Fourth Proportional to 20,079.86, 30,121.27 and 5,288.67

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Solution

The fourth proportional to 20,079.86, 30,121.27 and 5,288.67 is: 7,933.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,079.86 : 30,121.27 = 5,288.67 : x
  2. Step 2: Convert to fraction form
    20,079.86/30,121.27 = 5,288.67/x
  3. Step 3: Cross multiply
    20,079.86x = 30,121.27 × 5,288.67
  4. Step 4: Simplify right side
    20,079.86x = 159,301,520.10
  5. Step 5: Solve for x
    x = 159,301,520.10/20,079.86
  6. Step 6: Final answer
    x = 7,933.40

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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.