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Finding the Fourth Proportional to 21,449.76, 32,130.84 and 11,039.64

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Solution

The fourth proportional to 21,449.76, 32,130.84 and 11,039.64 is: 16,536.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,449.76 : 32,130.84 = 11,039.64 : x
  2. Step 2: Convert to fraction form
    21,449.76/32,130.84 = 11,039.64/x
  3. Step 3: Cross multiply
    21,449.76x = 32,130.84 × 11,039.64
  4. Step 4: Simplify right side
    21,449.76x = 354,712,906.50
  5. Step 5: Solve for x
    x = 354,712,906.50/21,449.76
  6. Step 6: Final answer
    x = 16,536.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.