Home / 12,180.64-18,281.36-4,790.28

Finding the Fourth Proportional to 12,180.64, 18,281.36 and 4,790.28

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Solution

The fourth proportional to 12,180.64, 18,281.36 and 4,790.28 is: 7,189.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,180.64 : 18,281.36 = 4,790.28 : x
  2. Step 2: Convert to fraction form
    12,180.64/18,281.36 = 4,790.28/x
  3. Step 3: Cross multiply
    12,180.64x = 18,281.36 × 4,790.28
  4. Step 4: Simplify right side
    12,180.64x = 87,572,833.18
  5. Step 5: Solve for x
    x = 87,572,833.18/12,180.64
  6. Step 6: Final answer
    x = 7,189.51

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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.