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Finding the Fourth Proportional to 6,781.35, 9,354.36 and 4,890.81

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Solution

The fourth proportional to 6,781.35, 9,354.36 and 4,890.81 is: 6,746.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,781.35 : 9,354.36 = 4,890.81 : x
  2. Step 2: Convert to fraction form
    6,781.35/9,354.36 = 4,890.81/x
  3. Step 3: Cross multiply
    6,781.35x = 9,354.36 × 4,890.81
  4. Step 4: Simplify right side
    6,781.35x = 45,750,397.43
  5. Step 5: Solve for x
    x = 45,750,397.43/6,781.35
  6. Step 6: Final answer
    x = 6,746.50

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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.