Home / 12,220.64-18,328.80-3,455.36

Finding the Fourth Proportional to 12,220.64, 18,328.80 and 3,455.36

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Solution

The fourth proportional to 12,220.64, 18,328.80 and 3,455.36 is: 5,182.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,220.64 : 18,328.80 = 3,455.36 : x
  2. Step 2: Convert to fraction form
    12,220.64/18,328.80 = 3,455.36/x
  3. Step 3: Cross multiply
    12,220.64x = 18,328.80 × 3,455.36
  4. Step 4: Simplify right side
    12,220.64x = 63,332,602.37
  5. Step 5: Solve for x
    x = 63,332,602.37/12,220.64
  6. Step 6: Final answer
    x = 5,182.43

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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.