Home / 5,156.80-7,116.40-2,798.96

Finding the Fourth Proportional to 5,156.80, 7,116.40 and 2,798.96

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Solution

The fourth proportional to 5,156.80, 7,116.40 and 2,798.96 is: 3,862.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,156.80 : 7,116.40 = 2,798.96 : x
  2. Step 2: Convert to fraction form
    5,156.80/7,116.40 = 2,798.96/x
  3. Step 3: Cross multiply
    5,156.80x = 7,116.40 × 2,798.96
  4. Step 4: Simplify right side
    5,156.80x = 19,918,518.94
  5. Step 5: Solve for x
    x = 19,918,518.94/5,156.80
  6. Step 6: Final answer
    x = 3,862.57

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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.