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Finding the Fourth Proportional to 7,891.79, 10,890.35 and 4,354.95

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Solution

The fourth proportional to 7,891.79, 10,890.35 and 4,354.95 is: 6,009.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,891.79 : 10,890.35 = 4,354.95 : x
  2. Step 2: Convert to fraction form
    7,891.79/10,890.35 = 4,354.95/x
  3. Step 3: Cross multiply
    7,891.79x = 10,890.35 × 4,354.95
  4. Step 4: Simplify right side
    7,891.79x = 47,426,907.96
  5. Step 5: Solve for x
    x = 47,426,907.96/7,891.79
  6. Step 6: Final answer
    x = 6,009.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.