Home / 5,315.94-7,968.70-1,981.75

Finding the Fourth Proportional to 5,315.94, 7,968.70 and 1,981.75

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Solution

The fourth proportional to 5,315.94, 7,968.70 and 1,981.75 is: 2,970.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,315.94 : 7,968.70 = 1,981.75 : x
  2. Step 2: Convert to fraction form
    5,315.94/7,968.70 = 1,981.75/x
  3. Step 3: Cross multiply
    5,315.94x = 7,968.70 × 1,981.75
  4. Step 4: Simplify right side
    5,315.94x = 15,791,921.47
  5. Step 5: Solve for x
    x = 15,791,921.47/5,315.94
  6. Step 6: Final answer
    x = 2,970.68

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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.