Home / 39,639.60-54,702.72-21,735.36

Finding the Fourth Proportional to 39,639.60, 54,702.72 and 21,735.36

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Solution

The fourth proportional to 39,639.60, 54,702.72 and 21,735.36 is: 29,994.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,639.60 : 54,702.72 = 21,735.36 : x
  2. Step 2: Convert to fraction form
    39,639.60/54,702.72 = 21,735.36/x
  3. Step 3: Cross multiply
    39,639.60x = 54,702.72 × 21,735.36
  4. Step 4: Simplify right side
    39,639.60x = 1,188,983,312.18
  5. Step 5: Solve for x
    x = 1,188,983,312.18/39,639.60
  6. Step 6: Final answer
    x = 29,994.84

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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.