Home / 39,760.81-54,868.69-21,855.76

Finding the Fourth Proportional to 39,760.81, 54,868.69 and 21,855.76

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Solution

The fourth proportional to 39,760.81, 54,868.69 and 21,855.76 is: 30,160.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,760.81 : 54,868.69 = 21,855.76 : x
  2. Step 2: Convert to fraction form
    39,760.81/54,868.69 = 21,855.76/x
  3. Step 3: Cross multiply
    39,760.81x = 54,868.69 × 21,855.76
  4. Step 4: Simplify right side
    39,760.81x = 1,199,196,810.30
  5. Step 5: Solve for x
    x = 1,199,196,810.30/39,760.81
  6. Step 6: Final answer
    x = 30,160.27

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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.