Home / 39,340.21-54,289.79-21,435.70

Finding the Fourth Proportional to 39,340.21, 54,289.79 and 21,435.70

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Solution

The fourth proportional to 39,340.21, 54,289.79 and 21,435.70 is: 29,581.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,340.21 : 54,289.79 = 21,435.70 : x
  2. Step 2: Convert to fraction form
    39,340.21/54,289.79 = 21,435.70/x
  3. Step 3: Cross multiply
    39,340.21x = 54,289.79 × 21,435.70
  4. Step 4: Simplify right side
    39,340.21x = 1,163,739,651.50
  5. Step 5: Solve for x
    x = 1,163,739,651.50/39,340.21
  6. Step 6: Final answer
    x = 29,581.43

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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.