Home / 12,507.15-18,760.75-5,111.60

Finding the Fourth Proportional to 12,507.15, 18,760.75 and 5,111.60

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Solution

The fourth proportional to 12,507.15, 18,760.75 and 5,111.60 is: 7,667.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,507.15 : 18,760.75 = 5,111.60 : x
  2. Step 2: Convert to fraction form
    12,507.15/18,760.75 = 5,111.60/x
  3. Step 3: Cross multiply
    12,507.15x = 18,760.75 × 5,111.60
  4. Step 4: Simplify right side
    12,507.15x = 95,897,424.14
  5. Step 5: Solve for x
    x = 95,897,424.14/12,507.15
  6. Step 6: Final answer
    x = 7,667.41

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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.