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Finding the Fourth Proportional to 10,408.80, 15,615.60 and 7,492.80

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Solution

The fourth proportional to 10,408.80, 15,615.60 and 7,492.80 is: 11,240.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,408.80 : 15,615.60 = 7,492.80 : x
  2. Step 2: Convert to fraction form
    10,408.80/15,615.60 = 7,492.80/x
  3. Step 3: Cross multiply
    10,408.80x = 15,615.60 × 7,492.80
  4. Step 4: Simplify right side
    10,408.80x = 117,004,567.68
  5. Step 5: Solve for x
    x = 117,004,567.68/10,408.80
  6. Step 6: Final answer
    x = 11,240.93

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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.