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Finding the Fourth Proportional to 8,645.04, 11,929.96 and 5,287.90

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Solution

The fourth proportional to 8,645.04, 11,929.96 and 5,287.90 is: 7,297.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,645.04 : 11,929.96 = 5,287.90 : x
  2. Step 2: Convert to fraction form
    8,645.04/11,929.96 = 5,287.90/x
  3. Step 3: Cross multiply
    8,645.04x = 11,929.96 × 5,287.90
  4. Step 4: Simplify right side
    8,645.04x = 63,084,435.48
  5. Step 5: Solve for x
    x = 63,084,435.48/8,645.04
  6. Step 6: Final answer
    x = 7,297.18

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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.