Home / 13,421.75-18,522.36-7,453.13

Finding the Fourth Proportional to 13,421.75, 18,522.36 and 7,453.13

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Solution

The fourth proportional to 13,421.75, 18,522.36 and 7,453.13 is: 10,285.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,421.75 : 18,522.36 = 7,453.13 : x
  2. Step 2: Convert to fraction form
    13,421.75/18,522.36 = 7,453.13/x
  3. Step 3: Cross multiply
    13,421.75x = 18,522.36 × 7,453.13
  4. Step 4: Simplify right side
    13,421.75x = 138,049,464.38
  5. Step 5: Solve for x
    x = 138,049,464.38/13,421.75
  6. Step 6: Final answer
    x = 10,285.51

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Half scale
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Double scale
Find fourth proportional to 13,422.75, 18,523.74 and 7,454.13
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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.