Home / 39,762.82-54,871.30-21,857.70

Finding the Fourth Proportional to 39,762.82, 54,871.30 and 21,857.70

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Solution

The fourth proportional to 39,762.82, 54,871.30 and 21,857.70 is: 30,162.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,762.82 : 54,871.30 = 21,857.70 : x
  2. Step 2: Convert to fraction form
    39,762.82/54,871.30 = 21,857.70/x
  3. Step 3: Cross multiply
    39,762.82x = 54,871.30 × 21,857.70
  4. Step 4: Simplify right side
    39,762.82x = 1,199,360,482.32
  5. Step 5: Solve for x
    x = 1,199,360,482.32/39,762.82
  6. Step 6: Final answer
    x = 30,162.86

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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.