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Finding the Fourth Proportional to 8,539.20, 11,783.94 and 4,813.20

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Solution

The fourth proportional to 8,539.20, 11,783.94 and 4,813.20 is: 6,642.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,539.20 : 11,783.94 = 4,813.20 : x
  2. Step 2: Convert to fraction form
    8,539.20/11,783.94 = 4,813.20/x
  3. Step 3: Cross multiply
    8,539.20x = 11,783.94 × 4,813.20
  4. Step 4: Simplify right side
    8,539.20x = 56,718,460.01
  5. Step 5: Solve for x
    x = 56,718,460.01/8,539.20
  6. Step 6: Final answer
    x = 6,642.13

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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.