Home / 20,330.14-30,480.81-7,839.58

Finding the Fourth Proportional to 20,330.14, 30,480.81 and 7,839.58

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Solution

The fourth proportional to 20,330.14, 30,480.81 and 7,839.58 is: 11,753.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,330.14 : 30,480.81 = 7,839.58 : x
  2. Step 2: Convert to fraction form
    20,330.14/30,480.81 = 7,839.58/x
  3. Step 3: Cross multiply
    20,330.14x = 30,480.81 × 7,839.58
  4. Step 4: Simplify right side
    20,330.14x = 238,956,748.46
  5. Step 5: Solve for x
    x = 238,956,748.46/20,330.14
  6. Step 6: Final answer
    x = 11,753.82

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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.