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Finding the Fourth Proportional to 18,959.49, 28,429.88 and 5,808.69

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Solution

The fourth proportional to 18,959.49, 28,429.88 and 5,808.69 is: 8,710.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,959.49 : 28,429.88 = 5,808.69 : x
  2. Step 2: Convert to fraction form
    18,959.49/28,429.88 = 5,808.69/x
  3. Step 3: Cross multiply
    18,959.49x = 28,429.88 × 5,808.69
  4. Step 4: Simplify right side
    18,959.49x = 165,140,330.61
  5. Step 5: Solve for x
    x = 165,140,330.61/18,959.49
  6. Step 6: Final answer
    x = 8,710.17

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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.