Home / 39,410.75-54,386.64-21,505.70

Finding the Fourth Proportional to 39,410.75, 54,386.64 and 21,505.70

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Solution

The fourth proportional to 39,410.75, 54,386.64 and 21,505.70 is: 29,677.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,410.75 : 54,386.64 = 21,505.70 : x
  2. Step 2: Convert to fraction form
    39,410.75/54,386.64 = 21,505.70/x
  3. Step 3: Cross multiply
    39,410.75x = 54,386.64 × 21,505.70
  4. Step 4: Simplify right side
    39,410.75x = 1,169,622,763.85
  5. Step 5: Solve for x
    x = 1,169,622,763.85/39,410.75
  6. Step 6: Final answer
    x = 29,677.76

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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.