Home / 13,437.09-20,128.20-6,395.80

Finding the Fourth Proportional to 13,437.09, 20,128.20 and 6,395.80

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Solution

The fourth proportional to 13,437.09, 20,128.20 and 6,395.80 is: 9,580.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,437.09 : 20,128.20 = 6,395.80 : x
  2. Step 2: Convert to fraction form
    13,437.09/20,128.20 = 6,395.80/x
  3. Step 3: Cross multiply
    13,437.09x = 20,128.20 × 6,395.80
  4. Step 4: Simplify right side
    13,437.09x = 128,735,941.56
  5. Step 5: Solve for x
    x = 128,735,941.56/13,437.09
  6. Step 6: Final answer
    x = 9,580.64

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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.