Home / 5,156.21-7,115.52-2,798.35

Finding the Fourth Proportional to 5,156.21, 7,115.52 and 2,798.35

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Solution

The fourth proportional to 5,156.21, 7,115.52 and 2,798.35 is: 3,861.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,156.21 : 7,115.52 = 2,798.35 : x
  2. Step 2: Convert to fraction form
    5,156.21/7,115.52 = 2,798.35/x
  3. Step 3: Cross multiply
    5,156.21x = 7,115.52 × 2,798.35
  4. Step 4: Simplify right side
    5,156.21x = 19,911,715.39
  5. Step 5: Solve for x
    x = 19,911,715.39/5,156.21
  6. Step 6: Final answer
    x = 3,861.70

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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.