Home / 21,431.84-29,575.80-12,000.56

Finding the Fourth Proportional to 21,431.84, 29,575.80 and 12,000.56

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Solution

The fourth proportional to 21,431.84, 29,575.80 and 12,000.56 is: 16,560.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,431.84 : 29,575.80 = 12,000.56 : x
  2. Step 2: Convert to fraction form
    21,431.84/29,575.80 = 12,000.56/x
  3. Step 3: Cross multiply
    21,431.84x = 29,575.80 × 12,000.56
  4. Step 4: Simplify right side
    21,431.84x = 354,926,162.45
  5. Step 5: Solve for x
    x = 354,926,162.45/21,431.84
  6. Step 6: Final answer
    x = 16,560.69

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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.