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Finding the Fourth Proportional to 21,576.84, 29,774.01 and 15,914.67

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Solution

The fourth proportional to 21,576.84, 29,774.01 and 15,914.67 is: 21,960.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,576.84 : 29,774.01 = 15,914.67 : x
  2. Step 2: Convert to fraction form
    21,576.84/29,774.01 = 15,914.67/x
  3. Step 3: Cross multiply
    21,576.84x = 29,774.01 × 15,914.67
  4. Step 4: Simplify right side
    21,576.84x = 473,843,543.73
  5. Step 5: Solve for x
    x = 473,843,543.73/21,576.84
  6. Step 6: Final answer
    x = 21,960.75

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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.