Home / 13,299.77-18,220.60-12,801.21

Finding the Fourth Proportional to 13,299.77, 18,220.60 and 12,801.21

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Solution

The fourth proportional to 13,299.77, 18,220.60 and 12,801.21 is: 17,537.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,299.77 : 18,220.60 = 12,801.21 : x
  2. Step 2: Convert to fraction form
    13,299.77/18,220.60 = 12,801.21/x
  3. Step 3: Cross multiply
    13,299.77x = 18,220.60 × 12,801.21
  4. Step 4: Simplify right side
    13,299.77x = 233,245,726.93
  5. Step 5: Solve for x
    x = 233,245,726.93/13,299.77
  6. Step 6: Final answer
    x = 17,537.58

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.