Home / 12,611.36-17,405.76-9,621.56

Finding the Fourth Proportional to 12,611.36, 17,405.76 and 9,621.56

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Solution

The fourth proportional to 12,611.36, 17,405.76 and 9,621.56 is: 13,279.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,611.36 : 17,405.76 = 9,621.56 : x
  2. Step 2: Convert to fraction form
    12,611.36/17,405.76 = 9,621.56/x
  3. Step 3: Cross multiply
    12,611.36x = 17,405.76 × 9,621.56
  4. Step 4: Simplify right side
    12,611.36x = 167,470,477.16
  5. Step 5: Solve for x
    x = 167,470,477.16/12,611.36
  6. Step 6: Final answer
    x = 13,279.34

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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.