Home / 13,126.18-18,113.73-7,157.97

Finding the Fourth Proportional to 13,126.18, 18,113.73 and 7,157.97

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Solution

The fourth proportional to 13,126.18, 18,113.73 and 7,157.97 is: 9,877.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,126.18 : 18,113.73 = 7,157.97 : x
  2. Step 2: Convert to fraction form
    13,126.18/18,113.73 = 7,157.97/x
  3. Step 3: Cross multiply
    13,126.18x = 18,113.73 × 7,157.97
  4. Step 4: Simplify right side
    13,126.18x = 129,657,535.93
  5. Step 5: Solve for x
    x = 129,657,535.93/13,126.18
  6. Step 6: Final answer
    x = 9,877.78

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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.