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Finding the Fourth Proportional to 8,602.60, 11,862.12 and 5,612.80

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Solution

The fourth proportional to 8,602.60, 11,862.12 and 5,612.80 is: 7,739.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,602.60 : 11,862.12 = 5,612.80 : x
  2. Step 2: Convert to fraction form
    8,602.60/11,862.12 = 5,612.80/x
  3. Step 3: Cross multiply
    8,602.60x = 11,862.12 × 5,612.80
  4. Step 4: Simplify right side
    8,602.60x = 66,579,707.14
  5. Step 5: Solve for x
    x = 66,579,707.14/8,602.60
  6. Step 6: Final answer
    x = 7,739.49

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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.