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Finding the Fourth Proportional to 8,697.67, 11,999.95 and 4,920.47

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Solution

The fourth proportional to 8,697.67, 11,999.95 and 4,920.47 is: 6,788.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,697.67 : 11,999.95 = 4,920.47 : x
  2. Step 2: Convert to fraction form
    8,697.67/11,999.95 = 4,920.47/x
  3. Step 3: Cross multiply
    8,697.67x = 11,999.95 × 4,920.47
  4. Step 4: Simplify right side
    8,697.67x = 59,045,393.98
  5. Step 5: Solve for x
    x = 59,045,393.98/8,697.67
  6. Step 6: Final answer
    x = 6,788.65

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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.