Home / 18,966.45-28,428.46-7,108.81

Finding the Fourth Proportional to 18,966.45, 28,428.46 and 7,108.81

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Solution

The fourth proportional to 18,966.45, 28,428.46 and 7,108.81 is: 10,655.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,966.45 : 28,428.46 = 7,108.81 : x
  2. Step 2: Convert to fraction form
    18,966.45/28,428.46 = 7,108.81/x
  3. Step 3: Cross multiply
    18,966.45x = 28,428.46 × 7,108.81
  4. Step 4: Simplify right side
    18,966.45x = 202,092,520.73
  5. Step 5: Solve for x
    x = 202,092,520.73/18,966.45
  6. Step 6: Final answer
    x = 10,655.26

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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.