Home / 5,156.40-7,115.52-2,918.16

Finding the Fourth Proportional to 5,156.40, 7,115.52 and 2,918.16

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Solution

The fourth proportional to 5,156.40, 7,115.52 and 2,918.16 is: 4,026.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,156.40 : 7,115.52 = 2,918.16 : x
  2. Step 2: Convert to fraction form
    5,156.40/7,115.52 = 2,918.16/x
  3. Step 3: Cross multiply
    5,156.40x = 7,115.52 × 2,918.16
  4. Step 4: Simplify right side
    5,156.40x = 20,764,225.84
  5. Step 5: Solve for x
    x = 20,764,225.84/5,156.40
  6. Step 6: Final answer
    x = 4,026.88

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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.