Home / 13,087.34-18,057.67-7,420.80

Finding the Fourth Proportional to 13,087.34, 18,057.67 and 7,420.80

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Solution

The fourth proportional to 13,087.34, 18,057.67 and 7,420.80 is: 10,239.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,087.34 : 18,057.67 = 7,420.80 : x
  2. Step 2: Convert to fraction form
    13,087.34/18,057.67 = 7,420.80/x
  3. Step 3: Cross multiply
    13,087.34x = 18,057.67 × 7,420.80
  4. Step 4: Simplify right side
    13,087.34x = 134,002,406.70
  5. Step 5: Solve for x
    x = 134,002,406.70/13,087.34
  6. Step 6: Final answer
    x = 10,239.09

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.