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Finding the Fourth Proportional to 7,887.80, 10,881.36 and 4,907.12

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Solution

The fourth proportional to 7,887.80, 10,881.36 and 4,907.12 is: 6,769.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,887.80 : 10,881.36 = 4,907.12 : x
  2. Step 2: Convert to fraction form
    7,887.80/10,881.36 = 4,907.12/x
  3. Step 3: Cross multiply
    7,887.80x = 10,881.36 × 4,907.12
  4. Step 4: Simplify right side
    7,887.80x = 53,396,139.28
  5. Step 5: Solve for x
    x = 53,396,139.28/7,887.80
  6. Step 6: Final answer
    x = 6,769.46

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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.