Home / 13,886.08-20,814.54-5,115.40

Finding the Fourth Proportional to 13,886.08, 20,814.54 and 5,115.40

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Solution

The fourth proportional to 13,886.08, 20,814.54 and 5,115.40 is: 7,667.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,886.08 : 20,814.54 = 5,115.40 : x
  2. Step 2: Convert to fraction form
    13,886.08/20,814.54 = 5,115.40/x
  3. Step 3: Cross multiply
    13,886.08x = 20,814.54 × 5,115.40
  4. Step 4: Simplify right side
    13,886.08x = 106,474,697.92
  5. Step 5: Solve for x
    x = 106,474,697.92/13,886.08
  6. Step 6: Final answer
    x = 7,667.73

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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.