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Finding the Fourth Proportional to 7,892.80, 10,887.48 and 5,059.18

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Solution

The fourth proportional to 7,892.80, 10,887.48 and 5,059.18 is: 6,978.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,892.80 : 10,887.48 = 5,059.18 : x
  2. Step 2: Convert to fraction form
    7,892.80/10,887.48 = 5,059.18/x
  3. Step 3: Cross multiply
    7,892.80x = 10,887.48 × 5,059.18
  4. Step 4: Simplify right side
    7,892.80x = 55,081,721.07
  5. Step 5: Solve for x
    x = 55,081,721.07/7,892.80
  6. Step 6: Final answer
    x = 6,978.73

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1.5x scale

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.