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Finding the Fourth Proportional to 39,723.66, 54,818.46 and 21,819

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Solution

The fourth proportional to 39,723.66, 54,818.46 and 21,819 is: 30,110.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,723.66 : 54,818.46 = 21,819 : x
  2. Step 2: Convert to fraction form
    39,723.66/54,818.46 = 21,819/x
  3. Step 3: Cross multiply
    39,723.66x = 54,818.46 × 21,819
  4. Step 4: Simplify right side
    39,723.66x = 1,196,083,978.74
  5. Step 5: Solve for x
    x = 1,196,083,978.74/39,723.66
  6. Step 6: Final answer
    x = 30,110.12

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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.