Home / 13,126.69-18,114.73-7,158.34

Finding the Fourth Proportional to 13,126.69, 18,114.73 and 7,158.34

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Solution

The fourth proportional to 13,126.69, 18,114.73 and 7,158.34 is: 9,878.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,126.69 : 18,114.73 = 7,158.34 : x
  2. Step 2: Convert to fraction form
    13,126.69/18,114.73 = 7,158.34/x
  3. Step 3: Cross multiply
    13,126.69x = 18,114.73 × 7,158.34
  4. Step 4: Simplify right side
    13,126.69x = 129,671,396.35
  5. Step 5: Solve for x
    x = 129,671,396.35/13,126.69
  6. Step 6: Final answer
    x = 9,878.45

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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.