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Finding the Fourth Proportional to 18,835.69, 28,253.53 and 14,678.81

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Solution

The fourth proportional to 18,835.69, 28,253.53 and 14,678.81 is: 22,018.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,835.69 : 28,253.53 = 14,678.81 : x
  2. Step 2: Convert to fraction form
    18,835.69/28,253.53 = 14,678.81/x
  3. Step 3: Cross multiply
    18,835.69x = 28,253.53 × 14,678.81
  4. Step 4: Simplify right side
    18,835.69x = 414,728,162.64
  5. Step 5: Solve for x
    x = 414,728,162.64/18,835.69
  6. Step 6: Final answer
    x = 22,018.21

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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.