Home / 13,135.12-18,126.60-7,166.77

Finding the Fourth Proportional to 13,135.12, 18,126.60 and 7,166.77

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Solution

The fourth proportional to 13,135.12, 18,126.60 and 7,166.77 is: 9,890.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,135.12 : 18,126.60 = 7,166.77 : x
  2. Step 2: Convert to fraction form
    13,135.12/18,126.60 = 7,166.77/x
  3. Step 3: Cross multiply
    13,135.12x = 18,126.60 × 7,166.77
  4. Step 4: Simplify right side
    13,135.12x = 129,909,173.08
  5. Step 5: Solve for x
    x = 129,909,173.08/13,135.12
  6. Step 6: Final answer
    x = 9,890.22

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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.