Home / 10,189.10-14,039.88-8,191.64

Finding the Fourth Proportional to 10,189.10, 14,039.88 and 8,191.64

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Solution

The fourth proportional to 10,189.10, 14,039.88 and 8,191.64 is: 11,287.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,189.10 : 14,039.88 = 8,191.64 : x
  2. Step 2: Convert to fraction form
    10,189.10/14,039.88 = 8,191.64/x
  3. Step 3: Cross multiply
    10,189.10x = 14,039.88 × 8,191.64
  4. Step 4: Simplify right side
    10,189.10x = 115,009,642.60
  5. Step 5: Solve for x
    x = 115,009,642.60/10,189.10
  6. Step 6: Final answer
    x = 11,287.52

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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.