Home / 11,169.79-15,430.33-8,928.72

Finding the Fourth Proportional to 11,169.79, 15,430.33 and 8,928.72

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Solution

The fourth proportional to 11,169.79, 15,430.33 and 8,928.72 is: 12,334.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,169.79 : 15,430.33 = 8,928.72 : x
  2. Step 2: Convert to fraction form
    11,169.79/15,430.33 = 8,928.72/x
  3. Step 3: Cross multiply
    11,169.79x = 15,430.33 × 8,928.72
  4. Step 4: Simplify right side
    11,169.79x = 137,773,131.62
  5. Step 5: Solve for x
    x = 137,773,131.62/11,169.79
  6. Step 6: Final answer
    x = 12,334.44

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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.