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Finding the Fourth Proportional to 8,680.23, 11,978.76 and 4,701.35

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Solution

The fourth proportional to 8,680.23, 11,978.76 and 4,701.35 is: 6,487.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,680.23 : 11,978.76 = 4,701.35 : x
  2. Step 2: Convert to fraction form
    8,680.23/11,978.76 = 4,701.35/x
  3. Step 3: Cross multiply
    8,680.23x = 11,978.76 × 4,701.35
  4. Step 4: Simplify right side
    8,680.23x = 56,316,390.90
  5. Step 5: Solve for x
    x = 56,316,390.90/8,680.23
  6. Step 6: Final answer
    x = 6,487.89

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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.