Home / 39,429.14-54,410.12-21,520.67

Finding the Fourth Proportional to 39,429.14, 54,410.12 and 21,520.67

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Solution

The fourth proportional to 39,429.14, 54,410.12 and 21,520.67 is: 29,697.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,429.14 : 54,410.12 = 21,520.67 : x
  2. Step 2: Convert to fraction form
    39,429.14/54,410.12 = 21,520.67/x
  3. Step 3: Cross multiply
    39,429.14x = 54,410.12 × 21,520.67
  4. Step 4: Simplify right side
    39,429.14x = 1,170,941,857.53
  5. Step 5: Solve for x
    x = 1,170,941,857.53/39,429.14
  6. Step 6: Final answer
    x = 29,697.38

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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.