Home / 7,128.39-10,689.84-2,447.53

Finding the Fourth Proportional to 7,128.39, 10,689.84 and 2,447.53

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Solution

The fourth proportional to 7,128.39, 10,689.84 and 2,447.53 is: 3,670.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,128.39 : 10,689.84 = 2,447.53 : x
  2. Step 2: Convert to fraction form
    7,128.39/10,689.84 = 2,447.53/x
  3. Step 3: Cross multiply
    7,128.39x = 10,689.84 × 2,447.53
  4. Step 4: Simplify right side
    7,128.39x = 26,163,704.10
  5. Step 5: Solve for x
    x = 26,163,704.10/7,128.39
  6. Step 6: Final answer
    x = 3,670.35

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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.