Home / 5,135.74-7,087.40-2,897.72

Finding the Fourth Proportional to 5,135.74, 7,087.40 and 2,897.72

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Solution

The fourth proportional to 5,135.74, 7,087.40 and 2,897.72 is: 3,998.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,135.74 : 7,087.40 = 2,897.72 : x
  2. Step 2: Convert to fraction form
    5,135.74/7,087.40 = 2,897.72/x
  3. Step 3: Cross multiply
    5,135.74x = 7,087.40 × 2,897.72
  4. Step 4: Simplify right side
    5,135.74x = 20,537,300.73
  5. Step 5: Solve for x
    x = 20,537,300.73/5,135.74
  6. Step 6: Final answer
    x = 3,998.90

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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.