Home / 7,126.40-10,689.60-3,627.20

Finding the Fourth Proportional to 7,126.40, 10,689.60 and 3,627.20

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Solution

The fourth proportional to 7,126.40, 10,689.60 and 3,627.20 is: 5,440.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,126.40 : 10,689.60 = 3,627.20 : x
  2. Step 2: Convert to fraction form
    7,126.40/10,689.60 = 3,627.20/x
  3. Step 3: Cross multiply
    7,126.40x = 10,689.60 × 3,627.20
  4. Step 4: Simplify right side
    7,126.40x = 38,773,317.12
  5. Step 5: Solve for x
    x = 38,773,317.12/7,126.40
  6. Step 6: Final answer
    x = 5,440.80

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1.5x scale

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.