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Finding the Fourth Proportional to 8,420.34, 11,620.08 and 5,063.19

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Solution

The fourth proportional to 8,420.34, 11,620.08 and 5,063.19 is: 6,987.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,420.34 : 11,620.08 = 5,063.19 : x
  2. Step 2: Convert to fraction form
    8,420.34/11,620.08 = 5,063.19/x
  3. Step 3: Cross multiply
    8,420.34x = 11,620.08 × 5,063.19
  4. Step 4: Simplify right side
    8,420.34x = 58,834,672.86
  5. Step 5: Solve for x
    x = 58,834,672.86/8,420.34
  6. Step 6: Final answer
    x = 6,987.21

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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.