Home / 11,421.45-17,107.88-6,488.55

Finding the Fourth Proportional to 11,421.45, 17,107.88 and 6,488.55

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Solution

The fourth proportional to 11,421.45, 17,107.88 and 6,488.55 is: 9,719.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,421.45 : 17,107.88 = 6,488.55 : x
  2. Step 2: Convert to fraction form
    11,421.45/17,107.88 = 6,488.55/x
  3. Step 3: Cross multiply
    11,421.45x = 17,107.88 × 6,488.55
  4. Step 4: Simplify right side
    11,421.45x = 111,005,302.33
  5. Step 5: Solve for x
    x = 111,005,302.33/11,421.45
  6. Step 6: Final answer
    x = 9,719.02

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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.