Home / 5,135.61-7,087.10-2,898.21

Finding the Fourth Proportional to 5,135.61, 7,087.10 and 2,898.21

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Solution

The fourth proportional to 5,135.61, 7,087.10 and 2,898.21 is: 3,999.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,135.61 : 7,087.10 = 2,898.21 : x
  2. Step 2: Convert to fraction form
    5,135.61/7,087.10 = 2,898.21/x
  3. Step 3: Cross multiply
    5,135.61x = 7,087.10 × 2,898.21
  4. Step 4: Simplify right side
    5,135.61x = 20,539,889.60
  5. Step 5: Solve for x
    x = 20,539,889.60/5,135.61
  6. Step 6: Final answer
    x = 3,999.50

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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.