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Finding the Fourth Proportional to 18,973.01, 26,181.61 and 11,421.79

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Solution

The fourth proportional to 18,973.01, 26,181.61 and 11,421.79 is: 15,761.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,973.01 : 26,181.61 = 11,421.79 : x
  2. Step 2: Convert to fraction form
    18,973.01/26,181.61 = 11,421.79/x
  3. Step 3: Cross multiply
    18,973.01x = 26,181.61 × 11,421.79
  4. Step 4: Simplify right side
    18,973.01x = 299,040,851.28
  5. Step 5: Solve for x
    x = 299,040,851.28/18,973.01
  6. Step 6: Final answer
    x = 15,761.38

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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.