Home / 39,639.69-54,702.15-21,734.84

Finding the Fourth Proportional to 39,639.69, 54,702.15 and 21,734.84

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Solution

The fourth proportional to 39,639.69, 54,702.15 and 21,734.84 is: 29,993.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,639.69 : 54,702.15 = 21,734.84 : x
  2. Step 2: Convert to fraction form
    39,639.69/54,702.15 = 21,734.84/x
  3. Step 3: Cross multiply
    39,639.69x = 54,702.15 × 21,734.84
  4. Step 4: Simplify right side
    39,639.69x = 1,188,942,533.16
  5. Step 5: Solve for x
    x = 1,188,942,533.16/39,639.69
  6. Step 6: Final answer
    x = 29,993.74

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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.