Home / 13,125.47-18,112.82-7,157.25

Finding the Fourth Proportional to 13,125.47, 18,112.82 and 7,157.25

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Solution

The fourth proportional to 13,125.47, 18,112.82 and 7,157.25 is: 9,876.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,125.47 : 18,112.82 = 7,157.25 : x
  2. Step 2: Convert to fraction form
    13,125.47/18,112.82 = 7,157.25/x
  3. Step 3: Cross multiply
    13,125.47x = 18,112.82 × 7,157.25
  4. Step 4: Simplify right side
    13,125.47x = 129,637,945.16
  5. Step 5: Solve for x
    x = 129,637,945.16/13,125.47
  6. Step 6: Final answer
    x = 9,876.83

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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.