Home / 11,109.12-15,329.28-6,393.60

Finding the Fourth Proportional to 11,109.12, 15,329.28 and 6,393.60

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Solution

The fourth proportional to 11,109.12, 15,329.28 and 6,393.60 is: 8,822.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,109.12 : 15,329.28 = 6,393.60 : x
  2. Step 2: Convert to fraction form
    11,109.12/15,329.28 = 6,393.60/x
  3. Step 3: Cross multiply
    11,109.12x = 15,329.28 × 6,393.60
  4. Step 4: Simplify right side
    11,109.12x = 98,009,284.61
  5. Step 5: Solve for x
    x = 98,009,284.61/11,109.12
  6. Step 6: Final answer
    x = 8,822.42

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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.