Home / 15,756.21-21,742.38-8,682.66

Finding the Fourth Proportional to 15,756.21, 21,742.38 and 8,682.66

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Solution

The fourth proportional to 15,756.21, 21,742.38 and 8,682.66 is: 11,981.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,756.21 : 21,742.38 = 8,682.66 : x
  2. Step 2: Convert to fraction form
    15,756.21/21,742.38 = 8,682.66/x
  3. Step 3: Cross multiply
    15,756.21x = 21,742.38 × 8,682.66
  4. Step 4: Simplify right side
    15,756.21x = 188,781,693.13
  5. Step 5: Solve for x
    x = 188,781,693.13/15,756.21
  6. Step 6: Final answer
    x = 11,981.42

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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.