Home / 30,189.96-45,299.52-20,838.11

Finding the Fourth Proportional to 30,189.96, 45,299.52 and 20,838.11

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Solution

The fourth proportional to 30,189.96, 45,299.52 and 20,838.11 is: 31,267.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,189.96 : 45,299.52 = 20,838.11 : x
  2. Step 2: Convert to fraction form
    30,189.96/45,299.52 = 20,838.11/x
  3. Step 3: Cross multiply
    30,189.96x = 45,299.52 × 20,838.11
  4. Step 4: Simplify right side
    30,189.96x = 943,956,154.21
  5. Step 5: Solve for x
    x = 943,956,154.21/30,189.96
  6. Step 6: Final answer
    x = 31,267.22

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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.