Home / 18,760.72-28,141.12-7,667.40

Finding the Fourth Proportional to 18,760.72, 28,141.12 and 7,667.40

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Solution

The fourth proportional to 18,760.72, 28,141.12 and 7,667.40 is: 11,501.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,760.72 : 28,141.12 = 7,667.40 : x
  2. Step 2: Convert to fraction form
    18,760.72/28,141.12 = 7,667.40/x
  3. Step 3: Cross multiply
    18,760.72x = 28,141.12 × 7,667.40
  4. Step 4: Simplify right side
    18,760.72x = 215,769,204.32
  5. Step 5: Solve for x
    x = 215,769,204.32/18,760.72
  6. Step 6: Final answer
    x = 11,501.12

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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.