Home / 39,419.46-54,396.81-21,513.60

Finding the Fourth Proportional to 39,419.46, 54,396.81 and 21,513.60

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Solution

The fourth proportional to 39,419.46, 54,396.81 and 21,513.60 is: 29,687.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,419.46 : 54,396.81 = 21,513.60 : x
  2. Step 2: Convert to fraction form
    39,419.46/54,396.81 = 21,513.60/x
  3. Step 3: Cross multiply
    39,419.46x = 54,396.81 × 21,513.60
  4. Step 4: Simplify right side
    39,419.46x = 1,170,271,211.62
  5. Step 5: Solve for x
    x = 1,170,271,211.62/39,419.46
  6. Step 6: Final answer
    x = 29,687.65

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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.