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Finding the Fourth Proportional to 20,561.58, 30,764.61 and 19,317.42

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Solution

The fourth proportional to 20,561.58, 30,764.61 and 19,317.42 is: 28,903.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,561.58 : 30,764.61 = 19,317.42 : x
  2. Step 2: Convert to fraction form
    20,561.58/30,764.61 = 19,317.42/x
  3. Step 3: Cross multiply
    20,561.58x = 30,764.61 × 19,317.42
  4. Step 4: Simplify right side
    20,561.58x = 594,292,892.51
  5. Step 5: Solve for x
    x = 594,292,892.51/20,561.58
  6. Step 6: Final answer
    x = 28,903.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.