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Finding the Fourth Proportional to 6,221.61, 8,581.55 and 5,283.63

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Solution

The fourth proportional to 6,221.61, 8,581.55 and 5,283.63 is: 7,287.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,221.61 : 8,581.55 = 5,283.63 : x
  2. Step 2: Convert to fraction form
    6,221.61/8,581.55 = 5,283.63/x
  3. Step 3: Cross multiply
    6,221.61x = 8,581.55 × 5,283.63
  4. Step 4: Simplify right side
    6,221.61x = 45,341,708.61
  5. Step 5: Solve for x
    x = 45,341,708.61/6,221.61
  6. Step 6: Final answer
    x = 7,287.78

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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.