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Finding the Fourth Proportional to 8,412.80, 11,609.84 and 4,636.13

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Solution

The fourth proportional to 8,412.80, 11,609.84 and 4,636.13 is: 6,397.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,412.80 : 11,609.84 = 4,636.13 : x
  2. Step 2: Convert to fraction form
    8,412.80/11,609.84 = 4,636.13/x
  3. Step 3: Cross multiply
    8,412.80x = 11,609.84 × 4,636.13
  4. Step 4: Simplify right side
    8,412.80x = 53,824,681.06
  5. Step 5: Solve for x
    x = 53,824,681.06/8,412.80
  6. Step 6: Final answer
    x = 6,397.95

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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.