Home / 20,663.66-28,515.74-11,712.86

Finding the Fourth Proportional to 20,663.66, 28,515.74 and 11,712.86

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Solution

The fourth proportional to 20,663.66, 28,515.74 and 11,712.86 is: 16,163.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,663.66 : 28,515.74 = 11,712.86 : x
  2. Step 2: Convert to fraction form
    20,663.66/28,515.74 = 11,712.86/x
  3. Step 3: Cross multiply
    20,663.66x = 28,515.74 × 11,712.86
  4. Step 4: Simplify right side
    20,663.66x = 334,000,870.42
  5. Step 5: Solve for x
    x = 334,000,870.42/20,663.66
  6. Step 6: Final answer
    x = 16,163.68

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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.