Home / 13,141.69-18,134.85-7,172.21

Finding the Fourth Proportional to 13,141.69, 18,134.85 and 7,172.21

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Solution

The fourth proportional to 13,141.69, 18,134.85 and 7,172.21 is: 9,897.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,141.69 : 18,134.85 = 7,172.21 : x
  2. Step 2: Convert to fraction form
    13,141.69/18,134.85 = 7,172.21/x
  3. Step 3: Cross multiply
    13,141.69x = 18,134.85 × 7,172.21
  4. Step 4: Simplify right side
    13,141.69x = 130,067,024.75
  5. Step 5: Solve for x
    x = 130,067,024.75/13,141.69
  6. Step 6: Final answer
    x = 9,897.28

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Half scale
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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.