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Finding the Fourth Proportional to 14,684.88, 20,268.64 and 8,400.88

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Solution

The fourth proportional to 14,684.88, 20,268.64 and 8,400.88 is: 11,595.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,684.88 : 20,268.64 = 8,400.88 : x
  2. Step 2: Convert to fraction form
    14,684.88/20,268.64 = 8,400.88/x
  3. Step 3: Cross multiply
    14,684.88x = 20,268.64 × 8,400.88
  4. Step 4: Simplify right side
    14,684.88x = 170,274,412.40
  5. Step 5: Solve for x
    x = 170,274,412.40/14,684.88
  6. Step 6: Final answer
    x = 11,595.22

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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.