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Finding the Fourth Proportional to 13,503.36, 20,225.88 and 13,172.88

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Solution

The fourth proportional to 13,503.36, 20,225.88 and 13,172.88 is: 19,730.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,503.36 : 20,225.88 = 13,172.88 : x
  2. Step 2: Convert to fraction form
    13,503.36/20,225.88 = 13,172.88/x
  3. Step 3: Cross multiply
    13,503.36x = 20,225.88 × 13,172.88
  4. Step 4: Simplify right side
    13,503.36x = 266,433,090.13
  5. Step 5: Solve for x
    x = 266,433,090.13/13,503.36
  6. Step 6: Final answer
    x = 19,730.87

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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.