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Finding the Fourth Proportional to 39,854.99, 55,000.28 and 21,950.55

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Solution

The fourth proportional to 39,854.99, 55,000.28 and 21,950.55 is: 30,291.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,854.99 : 55,000.28 = 21,950.55 : x
  2. Step 2: Convert to fraction form
    39,854.99/55,000.28 = 21,950.55/x
  3. Step 3: Cross multiply
    39,854.99x = 55,000.28 × 21,950.55
  4. Step 4: Simplify right side
    39,854.99x = 1,207,286,451.03
  5. Step 5: Solve for x
    x = 1,207,286,451.03/39,854.99
  6. Step 6: Final answer
    x = 30,291.98

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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.