Home / 7,113.79-9,817.46-3,969.91

Finding the Fourth Proportional to 7,113.79, 9,817.46 and 3,969.91

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Solution

The fourth proportional to 7,113.79, 9,817.46 and 3,969.91 is: 5,478.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,113.79 : 9,817.46 = 3,969.91 : x
  2. Step 2: Convert to fraction form
    7,113.79/9,817.46 = 3,969.91/x
  3. Step 3: Cross multiply
    7,113.79x = 9,817.46 × 3,969.91
  4. Step 4: Simplify right side
    7,113.79x = 38,974,432.63
  5. Step 5: Solve for x
    x = 38,974,432.63/7,113.79
  6. Step 6: Final answer
    x = 5,478.72

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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.