Home / 7,140.29-10,711.80-2,459.21

Finding the Fourth Proportional to 7,140.29, 10,711.80 and 2,459.21

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Solution

The fourth proportional to 7,140.29, 10,711.80 and 2,459.21 is: 3,689.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,140.29 : 10,711.80 = 2,459.21 : x
  2. Step 2: Convert to fraction form
    7,140.29/10,711.80 = 2,459.21/x
  3. Step 3: Cross multiply
    7,140.29x = 10,711.80 × 2,459.21
  4. Step 4: Simplify right side
    7,140.29x = 26,342,512.12
  5. Step 5: Solve for x
    x = 26,342,512.12/7,140.29
  6. Step 6: Final answer
    x = 3,689.28

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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.