Home / 13,158.72-18,127.80-9,172.62

Finding the Fourth Proportional to 13,158.72, 18,127.80 and 9,172.62

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Solution

The fourth proportional to 13,158.72, 18,127.80 and 9,172.62 is: 12,636.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,158.72 : 18,127.80 = 9,172.62 : x
  2. Step 2: Convert to fraction form
    13,158.72/18,127.80 = 9,172.62/x
  3. Step 3: Cross multiply
    13,158.72x = 18,127.80 × 9,172.62
  4. Step 4: Simplify right side
    13,158.72x = 166,279,420.84
  5. Step 5: Solve for x
    x = 166,279,420.84/13,158.72
  6. Step 6: Final answer
    x = 12,636.44

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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.