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Finding the Fourth Proportional to 8,430.69, 12,636.19 and 6,343.99

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Solution

The fourth proportional to 8,430.69, 12,636.19 and 6,343.99 is: 9,508.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,430.69 : 12,636.19 = 6,343.99 : x
  2. Step 2: Convert to fraction form
    8,430.69/12,636.19 = 6,343.99/x
  3. Step 3: Cross multiply
    8,430.69x = 12,636.19 × 6,343.99
  4. Step 4: Simplify right side
    8,430.69x = 80,163,839.34
  5. Step 5: Solve for x
    x = 80,163,839.34/8,430.69
  6. Step 6: Final answer
    x = 9,508.57

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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.