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Finding the Fourth Proportional to 21,843.95, 32,712.86 and 12,455.64

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Solution

The fourth proportional to 21,843.95, 32,712.86 and 12,455.64 is: 18,653.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,843.95 : 32,712.86 = 12,455.64 : x
  2. Step 2: Convert to fraction form
    21,843.95/32,712.86 = 12,455.64/x
  3. Step 3: Cross multiply
    21,843.95x = 32,712.86 × 12,455.64
  4. Step 4: Simplify right side
    21,843.95x = 407,459,638.67
  5. Step 5: Solve for x
    x = 407,459,638.67/21,843.95
  6. Step 6: Final answer
    x = 18,653.21

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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.