Home / 13,137.67-18,130.25-7,169.59

Finding the Fourth Proportional to 13,137.67, 18,130.25 and 7,169.59

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Solution

The fourth proportional to 13,137.67, 18,130.25 and 7,169.59 is: 9,894.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,137.67 : 18,130.25 = 7,169.59 : x
  2. Step 2: Convert to fraction form
    13,137.67/18,130.25 = 7,169.59/x
  3. Step 3: Cross multiply
    13,137.67x = 18,130.25 × 7,169.59
  4. Step 4: Simplify right side
    13,137.67x = 129,986,459.10
  5. Step 5: Solve for x
    x = 129,986,459.10/13,137.67
  6. Step 6: Final answer
    x = 9,894.18

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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.