Home / 13,135.25-18,126.63-7,166.76

Finding the Fourth Proportional to 13,135.25, 18,126.63 and 7,166.76

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Solution

The fourth proportional to 13,135.25, 18,126.63 and 7,166.76 is: 9,890.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,135.25 : 18,126.63 = 7,166.76 : x
  2. Step 2: Convert to fraction form
    13,135.25/18,126.63 = 7,166.76/x
  3. Step 3: Cross multiply
    13,135.25x = 18,126.63 × 7,166.76
  4. Step 4: Simplify right side
    13,135.25x = 129,909,206.82
  5. Step 5: Solve for x
    x = 129,909,206.82/13,135.25
  6. Step 6: Final answer
    x = 9,890.12

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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.