Home / 7,815.20-10,777.94-5,165.28

Finding the Fourth Proportional to 7,815.20, 10,777.94 and 5,165.28

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Solution

The fourth proportional to 7,815.20, 10,777.94 and 5,165.28 is: 7,123.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,815.20 : 10,777.94 = 5,165.28 : x
  2. Step 2: Convert to fraction form
    7,815.20/10,777.94 = 5,165.28/x
  3. Step 3: Cross multiply
    7,815.20x = 10,777.94 × 5,165.28
  4. Step 4: Simplify right side
    7,815.20x = 55,671,090.84
  5. Step 5: Solve for x
    x = 55,671,090.84/7,815.20
  6. Step 6: Final answer
    x = 7,123.44

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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.