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Finding the Fourth Proportional to 19,158.84, 28,699.86 and 8,756.28

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Solution

The fourth proportional to 19,158.84, 28,699.86 and 8,756.28 is: 13,116.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,158.84 : 28,699.86 = 8,756.28 : x
  2. Step 2: Convert to fraction form
    19,158.84/28,699.86 = 8,756.28/x
  3. Step 3: Cross multiply
    19,158.84x = 28,699.86 × 8,756.28
  4. Step 4: Simplify right side
    19,158.84x = 251,304,010.12
  5. Step 5: Solve for x
    x = 251,304,010.12/19,158.84
  6. Step 6: Final answer
    x = 13,116.87

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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.