Home / 12,255.20-18,390.36-5,680.16

Finding the Fourth Proportional to 12,255.20, 18,390.36 and 5,680.16

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Solution

The fourth proportional to 12,255.20, 18,390.36 and 5,680.16 is: 8,523.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,255.20 : 18,390.36 = 5,680.16 : x
  2. Step 2: Convert to fraction form
    12,255.20/18,390.36 = 5,680.16/x
  3. Step 3: Cross multiply
    12,255.20x = 18,390.36 × 5,680.16
  4. Step 4: Simplify right side
    12,255.20x = 104,460,187.26
  5. Step 5: Solve for x
    x = 104,460,187.26/12,255.20
  6. Step 6: Final answer
    x = 8,523.74

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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.