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Finding the Fourth Proportional to 39,459, 59,217.72 and 18,682.56

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Solution

The fourth proportional to 39,459, 59,217.72 and 18,682.56 is: 28,037.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,459 : 59,217.72 = 18,682.56 : x
  2. Step 2: Convert to fraction form
    39,459/59,217.72 = 18,682.56/x
  3. Step 3: Cross multiply
    39,459x = 59,217.72 × 18,682.56
  4. Step 4: Simplify right side
    39,459x = 1,106,338,606.96
  5. Step 5: Solve for x
    x = 1,106,338,606.96/39,459
  6. Step 6: Final answer
    x = 28,037.67

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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.