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Finding the Fourth Proportional to 21,501.70, 29,674.21 and 12,552.09

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Solution

The fourth proportional to 21,501.70, 29,674.21 and 12,552.09 is: 17,322.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,501.70 : 29,674.21 = 12,552.09 : x
  2. Step 2: Convert to fraction form
    21,501.70/29,674.21 = 12,552.09/x
  3. Step 3: Cross multiply
    21,501.70x = 29,674.21 × 12,552.09
  4. Step 4: Simplify right side
    21,501.70x = 372,473,354.60
  5. Step 5: Solve for x
    x = 372,473,354.60/21,501.70
  6. Step 6: Final answer
    x = 17,322.97

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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.