Home / 18,720.90-28,057.06-7,614.66

Finding the Fourth Proportional to 18,720.90, 28,057.06 and 7,614.66

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Solution

The fourth proportional to 18,720.90, 28,057.06 and 7,614.66 is: 11,412.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,720.90 : 28,057.06 = 7,614.66 : x
  2. Step 2: Convert to fraction form
    18,720.90/28,057.06 = 7,614.66/x
  3. Step 3: Cross multiply
    18,720.90x = 28,057.06 × 7,614.66
  4. Step 4: Simplify right side
    18,720.90x = 213,644,972.50
  5. Step 5: Solve for x
    x = 213,644,972.50/18,720.90
  6. Step 6: Final answer
    x = 11,412.11

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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.