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Finding the Fourth Proportional to 21,133.78, 29,164.53 and 11,573.71

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Solution

The fourth proportional to 21,133.78, 29,164.53 and 11,573.71 is: 15,971.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,133.78 : 29,164.53 = 11,573.71 : x
  2. Step 2: Convert to fraction form
    21,133.78/29,164.53 = 11,573.71/x
  3. Step 3: Cross multiply
    21,133.78x = 29,164.53 × 11,573.71
  4. Step 4: Simplify right side
    21,133.78x = 337,541,812.51
  5. Step 5: Solve for x
    x = 337,541,812.51/21,133.78
  6. Step 6: Final answer
    x = 15,971.67

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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.