Home / 13,113.69-18,097.10-7,145.36

Finding the Fourth Proportional to 13,113.69, 18,097.10 and 7,145.36

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Solution

The fourth proportional to 13,113.69, 18,097.10 and 7,145.36 is: 9,860.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,113.69 : 18,097.10 = 7,145.36 : x
  2. Step 2: Convert to fraction form
    13,113.69/18,097.10 = 7,145.36/x
  3. Step 3: Cross multiply
    13,113.69x = 18,097.10 × 7,145.36
  4. Step 4: Simplify right side
    13,113.69x = 129,310,294.46
  5. Step 5: Solve for x
    x = 129,310,294.46/13,113.69
  6. Step 6: Final answer
    x = 9,860.71

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Half scale
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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.