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Finding the Fourth Proportional to 5,636.70, 8,455.70 and 1,688.18

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Solution

The fourth proportional to 5,636.70, 8,455.70 and 1,688.18 is: 2,532.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,636.70 : 8,455.70 = 1,688.18 : x
  2. Step 2: Convert to fraction form
    5,636.70/8,455.70 = 1,688.18/x
  3. Step 3: Cross multiply
    5,636.70x = 8,455.70 × 1,688.18
  4. Step 4: Simplify right side
    5,636.70x = 14,274,705.57
  5. Step 5: Solve for x
    x = 14,274,705.57/5,636.70
  6. Step 6: Final answer
    x = 2,532.46

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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.