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Finding the Fourth Proportional to 18,710.81, 28,066.14 and 4,859.81

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Solution

The fourth proportional to 18,710.81, 28,066.14 and 4,859.81 is: 7,289.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,710.81 : 28,066.14 = 4,859.81 : x
  2. Step 2: Convert to fraction form
    18,710.81/28,066.14 = 4,859.81/x
  3. Step 3: Cross multiply
    18,710.81x = 28,066.14 × 4,859.81
  4. Step 4: Simplify right side
    18,710.81x = 136,395,967.50
  5. Step 5: Solve for x
    x = 136,395,967.50/18,710.81
  6. Step 6: Final answer
    x = 7,289.69

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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.