Home / 20,101.86-30,155.12-7,631.19

Finding the Fourth Proportional to 20,101.86, 30,155.12 and 7,631.19

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Solution

The fourth proportional to 20,101.86, 30,155.12 and 7,631.19 is: 11,447.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,101.86 : 30,155.12 = 7,631.19 : x
  2. Step 2: Convert to fraction form
    20,101.86/30,155.12 = 7,631.19/x
  3. Step 3: Cross multiply
    20,101.86x = 30,155.12 × 7,631.19
  4. Step 4: Simplify right side
    20,101.86x = 230,119,412.04
  5. Step 5: Solve for x
    x = 230,119,412.04/20,101.86
  6. Step 6: Final answer
    x = 11,447.67

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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.