Home / 13,113.99-18,097.25-7,145.91

Finding the Fourth Proportional to 13,113.99, 18,097.25 and 7,145.91

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Solution

The fourth proportional to 13,113.99, 18,097.25 and 7,145.91 is: 9,861.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,113.99 : 18,097.25 = 7,145.91 : x
  2. Step 2: Convert to fraction form
    13,113.99/18,097.25 = 7,145.91/x
  3. Step 3: Cross multiply
    13,113.99x = 18,097.25 × 7,145.91
  4. Step 4: Simplify right side
    13,113.99x = 129,321,284.02
  5. Step 5: Solve for x
    x = 129,321,284.02/13,113.99
  6. Step 6: Final answer
    x = 9,861.32

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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.