Home / 5,156.40-7,730.70-2,561.16

Finding the Fourth Proportional to 5,156.40, 7,730.70 and 2,561.16

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Solution

The fourth proportional to 5,156.40, 7,730.70 and 2,561.16 is: 3,839.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,156.40 : 7,730.70 = 2,561.16 : x
  2. Step 2: Convert to fraction form
    5,156.40/7,730.70 = 2,561.16/x
  3. Step 3: Cross multiply
    5,156.40x = 7,730.70 × 2,561.16
  4. Step 4: Simplify right side
    5,156.40x = 19,799,559.61
  5. Step 5: Solve for x
    x = 19,799,559.61/5,156.40
  6. Step 6: Final answer
    x = 3,839.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.