Home / 13,928.08-20,873.16-7,678.72

Finding the Fourth Proportional to 13,928.08, 20,873.16 and 7,678.72

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Solution

The fourth proportional to 13,928.08, 20,873.16 and 7,678.72 is: 11,507.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,928.08 : 20,873.16 = 7,678.72 : x
  2. Step 2: Convert to fraction form
    13,928.08/20,873.16 = 7,678.72/x
  3. Step 3: Cross multiply
    13,928.08x = 20,873.16 × 7,678.72
  4. Step 4: Simplify right side
    13,928.08x = 160,279,151.16
  5. Step 5: Solve for x
    x = 160,279,151.16/13,928.08
  6. Step 6: Final answer
    x = 11,507.63

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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.