Home / 15,764.96-21,756.45-8,691.36

Finding the Fourth Proportional to 15,764.96, 21,756.45 and 8,691.36

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Solution

The fourth proportional to 15,764.96, 21,756.45 and 8,691.36 is: 11,994.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,764.96 : 21,756.45 = 8,691.36 : x
  2. Step 2: Convert to fraction form
    15,764.96/21,756.45 = 8,691.36/x
  3. Step 3: Cross multiply
    15,764.96x = 21,756.45 × 8,691.36
  4. Step 4: Simplify right side
    15,764.96x = 189,093,139.27
  5. Step 5: Solve for x
    x = 189,093,139.27/15,764.96
  6. Step 6: Final answer
    x = 11,994.52

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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.