Home / 13,151.90-18,149.73-7,487.09

Finding the Fourth Proportional to 13,151.90, 18,149.73 and 7,487.09

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Solution

The fourth proportional to 13,151.90, 18,149.73 and 7,487.09 is: 10,332.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,151.90 : 18,149.73 = 7,487.09 : x
  2. Step 2: Convert to fraction form
    13,151.90/18,149.73 = 7,487.09/x
  3. Step 3: Cross multiply
    13,151.90x = 18,149.73 × 7,487.09
  4. Step 4: Simplify right side
    13,151.90x = 135,888,661.99
  5. Step 5: Solve for x
    x = 135,888,661.99/13,151.90
  6. Step 6: Final answer
    x = 10,332.25

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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.