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Finding the Fourth Proportional to 7,070.90, 10,605.90 and 2,688.26

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Solution

The fourth proportional to 7,070.90, 10,605.90 and 2,688.26 is: 4,032.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,070.90 : 10,605.90 = 2,688.26 : x
  2. Step 2: Convert to fraction form
    7,070.90/10,605.90 = 2,688.26/x
  3. Step 3: Cross multiply
    7,070.90x = 10,605.90 × 2,688.26
  4. Step 4: Simplify right side
    7,070.90x = 28,511,416.73
  5. Step 5: Solve for x
    x = 28,511,416.73/7,070.90
  6. Step 6: Final answer
    x = 4,032.22

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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.