Home / 13,203.41-18,220.55-7,898.21

Finding the Fourth Proportional to 13,203.41, 18,220.55 and 7,898.21

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Solution

The fourth proportional to 13,203.41, 18,220.55 and 7,898.21 is: 10,899.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,203.41 : 18,220.55 = 7,898.21 : x
  2. Step 2: Convert to fraction form
    13,203.41/18,220.55 = 7,898.21/x
  3. Step 3: Cross multiply
    13,203.41x = 18,220.55 × 7,898.21
  4. Step 4: Simplify right side
    13,203.41x = 143,909,667.95
  5. Step 5: Solve for x
    x = 143,909,667.95/13,203.41
  6. Step 6: Final answer
    x = 10,899.44

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Double scale
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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.