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Finding the Fourth Proportional to 18,678.91, 28,019.76 and 6,835.45

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Solution

The fourth proportional to 18,678.91, 28,019.76 and 6,835.45 is: 10,253.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,678.91 : 28,019.76 = 6,835.45 : x
  2. Step 2: Convert to fraction form
    18,678.91/28,019.76 = 6,835.45/x
  3. Step 3: Cross multiply
    18,678.91x = 28,019.76 × 6,835.45
  4. Step 4: Simplify right side
    18,678.91x = 191,527,668.49
  5. Step 5: Solve for x
    x = 191,527,668.49/18,678.91
  6. Step 6: Final answer
    x = 10,253.69

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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.