Home / 10,145.12-15,209.85-6,439.64

Finding the Fourth Proportional to 10,145.12, 15,209.85 and 6,439.64

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Solution

The fourth proportional to 10,145.12, 15,209.85 and 6,439.64 is: 9,654.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,145.12 : 15,209.85 = 6,439.64 : x
  2. Step 2: Convert to fraction form
    10,145.12/15,209.85 = 6,439.64/x
  3. Step 3: Cross multiply
    10,145.12x = 15,209.85 × 6,439.64
  4. Step 4: Simplify right side
    10,145.12x = 97,945,958.45
  5. Step 5: Solve for x
    x = 97,945,958.45/10,145.12
  6. Step 6: Final answer
    x = 9,654.49

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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.