Home / 11,421.72-15,748.92-9,291.42

Finding the Fourth Proportional to 11,421.72, 15,748.92 and 9,291.42

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Solution

The fourth proportional to 11,421.72, 15,748.92 and 9,291.42 is: 12,811.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,421.72 : 15,748.92 = 9,291.42 : x
  2. Step 2: Convert to fraction form
    11,421.72/15,748.92 = 9,291.42/x
  3. Step 3: Cross multiply
    11,421.72x = 15,748.92 × 9,291.42
  4. Step 4: Simplify right side
    11,421.72x = 146,329,830.27
  5. Step 5: Solve for x
    x = 146,329,830.27/11,421.72
  6. Step 6: Final answer
    x = 12,811.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.