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Finding the Fourth Proportional to 6,487.70, 8,934.15 and 5,636.55

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Solution

The fourth proportional to 6,487.70, 8,934.15 and 5,636.55 is: 7,762.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,487.70 : 8,934.15 = 5,636.55 : x
  2. Step 2: Convert to fraction form
    6,487.70/8,934.15 = 5,636.55/x
  3. Step 3: Cross multiply
    6,487.70x = 8,934.15 × 5,636.55
  4. Step 4: Simplify right side
    6,487.70x = 50,357,806.12
  5. Step 5: Solve for x
    x = 50,357,806.12/6,487.70
  6. Step 6: Final answer
    x = 7,762.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.