Home / 18,678.50-28,019.81-9,320.88

Finding the Fourth Proportional to 18,678.50, 28,019.81 and 9,320.88

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Solution

The fourth proportional to 18,678.50, 28,019.81 and 9,320.88 is: 13,982.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,678.50 : 28,019.81 = 9,320.88 : x
  2. Step 2: Convert to fraction form
    18,678.50/28,019.81 = 9,320.88/x
  3. Step 3: Cross multiply
    18,678.50x = 28,019.81 × 9,320.88
  4. Step 4: Simplify right side
    18,678.50x = 261,169,204.97
  5. Step 5: Solve for x
    x = 261,169,204.97/18,678.50
  6. Step 6: Final answer
    x = 13,982.34

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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.