Home / 11,818.50-16,308.90-6,781.68

Finding the Fourth Proportional to 11,818.50, 16,308.90 and 6,781.68

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Solution

The fourth proportional to 11,818.50, 16,308.90 and 6,781.68 is: 9,358.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,818.50 : 16,308.90 = 6,781.68 : x
  2. Step 2: Convert to fraction form
    11,818.50/16,308.90 = 6,781.68/x
  3. Step 3: Cross multiply
    11,818.50x = 16,308.90 × 6,781.68
  4. Step 4: Simplify right side
    11,818.50x = 110,601,740.95
  5. Step 5: Solve for x
    x = 110,601,740.95/11,818.50
  6. Step 6: Final answer
    x = 9,358.36

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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.