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Finding the Fourth Proportional to 39,571.72, 54,608.88 and 21,666.72

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Solution

The fourth proportional to 39,571.72, 54,608.88 and 21,666.72 is: 29,900.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,571.72 : 54,608.88 = 21,666.72 : x
  2. Step 2: Convert to fraction form
    39,571.72/54,608.88 = 21,666.72/x
  3. Step 3: Cross multiply
    39,571.72x = 54,608.88 × 21,666.72
  4. Step 4: Simplify right side
    39,571.72x = 1,183,195,312.47
  5. Step 5: Solve for x
    x = 1,183,195,312.47/39,571.72
  6. Step 6: Final answer
    x = 29,900.02

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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.