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Finding the Fourth Proportional to 6,622.90, 9,128.61 and 6,447.59

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Solution

The fourth proportional to 6,622.90, 9,128.61 and 6,447.59 is: 8,886.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,622.90 : 9,128.61 = 6,447.59 : x
  2. Step 2: Convert to fraction form
    6,622.90/9,128.61 = 6,447.59/x
  3. Step 3: Cross multiply
    6,622.90x = 9,128.61 × 6,447.59
  4. Step 4: Simplify right side
    6,622.90x = 58,857,534.55
  5. Step 5: Solve for x
    x = 58,857,534.55/6,622.90
  6. Step 6: Final answer
    x = 8,886.98

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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.