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Finding the Fourth Proportional to 8,505.90, 11,739.05 and 4,970.26

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Solution

The fourth proportional to 8,505.90, 11,739.05 and 4,970.26 is: 6,859.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,505.90 : 11,739.05 = 4,970.26 : x
  2. Step 2: Convert to fraction form
    8,505.90/11,739.05 = 4,970.26/x
  3. Step 3: Cross multiply
    8,505.90x = 11,739.05 × 4,970.26
  4. Step 4: Simplify right side
    8,505.90x = 58,346,130.65
  5. Step 5: Solve for x
    x = 58,346,130.65/8,505.90
  6. Step 6: Final answer
    x = 6,859.49

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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.