Home / 10,115.36-15,146.45-8,130.45

Finding the Fourth Proportional to 10,115.36, 15,146.45 and 8,130.45

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Solution

The fourth proportional to 10,115.36, 15,146.45 and 8,130.45 is: 12,174.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,115.36 : 15,146.45 = 8,130.45 : x
  2. Step 2: Convert to fraction form
    10,115.36/15,146.45 = 8,130.45/x
  3. Step 3: Cross multiply
    10,115.36x = 15,146.45 × 8,130.45
  4. Step 4: Simplify right side
    10,115.36x = 123,147,512.59
  5. Step 5: Solve for x
    x = 123,147,512.59/10,115.36
  6. Step 6: Final answer
    x = 12,174.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.