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Finding the Fourth Proportional to 11,361.60, 15,674.40 and 8,210.88

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Solution

The fourth proportional to 11,361.60, 15,674.40 and 8,210.88 is: 11,327.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,361.60 : 15,674.40 = 8,210.88 : x
  2. Step 2: Convert to fraction form
    11,361.60/15,674.40 = 8,210.88/x
  3. Step 3: Cross multiply
    11,361.60x = 15,674.40 × 8,210.88
  4. Step 4: Simplify right side
    11,361.60x = 128,700,617.47
  5. Step 5: Solve for x
    x = 128,700,617.47/11,361.60
  6. Step 6: Final answer
    x = 11,327.68

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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.