Home / 39,340.15-54,288.72-21,435.30

Finding the Fourth Proportional to 39,340.15, 54,288.72 and 21,435.30

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Solution

The fourth proportional to 39,340.15, 54,288.72 and 21,435.30 is: 29,580.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,340.15 : 54,288.72 = 21,435.30 : x
  2. Step 2: Convert to fraction form
    39,340.15/54,288.72 = 21,435.30/x
  3. Step 3: Cross multiply
    39,340.15x = 54,288.72 × 21,435.30
  4. Step 4: Simplify right side
    39,340.15x = 1,163,694,999.82
  5. Step 5: Solve for x
    x = 1,163,694,999.82/39,340.15
  6. Step 6: Final answer
    x = 29,580.34

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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.