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Finding the Fourth Proportional to 7,126.60, 10,689.90 and 7,029.40

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Solution

The fourth proportional to 7,126.60, 10,689.90 and 7,029.40 is: 10,544.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,126.60 : 10,689.90 = 7,029.40 : x
  2. Step 2: Convert to fraction form
    7,126.60/10,689.90 = 7,029.40/x
  3. Step 3: Cross multiply
    7,126.60x = 10,689.90 × 7,029.40
  4. Step 4: Simplify right side
    7,126.60x = 75,143,583.06
  5. Step 5: Solve for x
    x = 75,143,583.06/7,126.60
  6. Step 6: Final answer
    x = 10,544.10

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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.