Home / 8,390.98-11,569.80-6,976.32

Finding the Fourth Proportional to 8,390.98, 11,569.80 and 6,976.32

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Solution

The fourth proportional to 8,390.98, 11,569.80 and 6,976.32 is: 9,619.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,390.98 : 11,569.80 = 6,976.32 : x
  2. Step 2: Convert to fraction form
    8,390.98/11,569.80 = 6,976.32/x
  3. Step 3: Cross multiply
    8,390.98x = 11,569.80 × 6,976.32
  4. Step 4: Simplify right side
    8,390.98x = 80,714,627.14
  5. Step 5: Solve for x
    x = 80,714,627.14/8,390.98
  6. Step 6: Final answer
    x = 9,619.21

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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.