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Finding the Fourth Proportional to 39,756.77, 54,865.04 and 21,851.72

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Solution

The fourth proportional to 39,756.77, 54,865.04 and 21,851.72 is: 30,155.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,756.77 : 54,865.04 = 21,851.72 : x
  2. Step 2: Convert to fraction form
    39,756.77/54,865.04 = 21,851.72/x
  3. Step 3: Cross multiply
    39,756.77x = 54,865.04 × 21,851.72
  4. Step 4: Simplify right side
    39,756.77x = 1,198,895,491.87
  5. Step 5: Solve for x
    x = 1,198,895,491.87/39,756.77
  6. Step 6: Final answer
    x = 30,155.76

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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.