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Finding the Fourth Proportional to 21,666.84, 29,900.25 and 11,730.84

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Solution

The fourth proportional to 21,666.84, 29,900.25 and 11,730.84 is: 16,188.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,666.84 : 29,900.25 = 11,730.84 : x
  2. Step 2: Convert to fraction form
    21,666.84/29,900.25 = 11,730.84/x
  3. Step 3: Cross multiply
    21,666.84x = 29,900.25 × 11,730.84
  4. Step 4: Simplify right side
    21,666.84x = 350,755,048.71
  5. Step 5: Solve for x
    x = 350,755,048.71/21,666.84
  6. Step 6: Final answer
    x = 16,188.57

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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.