Home / 12,109.28-18,188.84-7,955.19

Finding the Fourth Proportional to 12,109.28, 18,188.84 and 7,955.19

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Solution

The fourth proportional to 12,109.28, 18,188.84 and 7,955.19 is: 11,949.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,109.28 : 18,188.84 = 7,955.19 : x
  2. Step 2: Convert to fraction form
    12,109.28/18,188.84 = 7,955.19/x
  3. Step 3: Cross multiply
    12,109.28x = 18,188.84 × 7,955.19
  4. Step 4: Simplify right side
    12,109.28x = 144,695,638.30
  5. Step 5: Solve for x
    x = 144,695,638.30/12,109.28
  6. Step 6: Final answer
    x = 11,949.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.