Home / 12,120.60-18,148.50-6,919.32

Finding the Fourth Proportional to 12,120.60, 18,148.50 and 6,919.32

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Solution

The fourth proportional to 12,120.60, 18,148.50 and 6,919.32 is: 10,360.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,120.60 : 18,148.50 = 6,919.32 : x
  2. Step 2: Convert to fraction form
    12,120.60/18,148.50 = 6,919.32/x
  3. Step 3: Cross multiply
    12,120.60x = 18,148.50 × 6,919.32
  4. Step 4: Simplify right side
    12,120.60x = 125,575,279.02
  5. Step 5: Solve for x
    x = 125,575,279.02/12,120.60
  6. Step 6: Final answer
    x = 10,360.48

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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.