Home / 10,319.26-15,464.30-5,128.78

Finding the Fourth Proportional to 10,319.26, 15,464.30 and 5,128.78

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Solution

The fourth proportional to 10,319.26, 15,464.30 and 5,128.78 is: 7,685.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,319.26 : 15,464.30 = 5,128.78 : x
  2. Step 2: Convert to fraction form
    10,319.26/15,464.30 = 5,128.78/x
  3. Step 3: Cross multiply
    10,319.26x = 15,464.30 × 5,128.78
  4. Step 4: Simplify right side
    10,319.26x = 79,312,992.55
  5. Step 5: Solve for x
    x = 79,312,992.55/10,319.26
  6. Step 6: Final answer
    x = 7,685.92

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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.