Home / 13,416.49-20,128.85-6,405.44

Finding the Fourth Proportional to 13,416.49, 20,128.85 and 6,405.44

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Solution

The fourth proportional to 13,416.49, 20,128.85 and 6,405.44 is: 9,610.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,416.49 : 20,128.85 = 6,405.44 : x
  2. Step 2: Convert to fraction form
    13,416.49/20,128.85 = 6,405.44/x
  3. Step 3: Cross multiply
    13,416.49x = 20,128.85 × 6,405.44
  4. Step 4: Simplify right side
    13,416.49x = 128,934,140.94
  5. Step 5: Solve for x
    x = 128,934,140.94/13,416.49
  6. Step 6: Final answer
    x = 9,610.12

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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.