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Finding the Fourth Proportional to 39,757.99, 54,866.16 and 21,854.83

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Solution

The fourth proportional to 39,757.99, 54,866.16 and 21,854.83 is: 30,159.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,757.99 : 54,866.16 = 21,854.83 : x
  2. Step 2: Convert to fraction form
    39,757.99/54,866.16 = 21,854.83/x
  3. Step 3: Cross multiply
    39,757.99x = 54,866.16 × 21,854.83
  4. Step 4: Simplify right side
    39,757.99x = 1,199,090,599.55
  5. Step 5: Solve for x
    x = 1,199,090,599.55/39,757.99
  6. Step 6: Final answer
    x = 30,159.74

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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.