Home / 28,372.92-39,149.20-18,299.40

Finding the Fourth Proportional to 28,372.92, 39,149.20 and 18,299.40

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Solution

The fourth proportional to 28,372.92, 39,149.20 and 18,299.40 is: 25,249.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,372.92 : 39,149.20 = 18,299.40 : x
  2. Step 2: Convert to fraction form
    28,372.92/39,149.20 = 18,299.40/x
  3. Step 3: Cross multiply
    28,372.92x = 39,149.20 × 18,299.40
  4. Step 4: Simplify right side
    28,372.92x = 716,406,870.48
  5. Step 5: Solve for x
    x = 716,406,870.48/28,372.92
  6. Step 6: Final answer
    x = 25,249.67

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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.