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Finding the Fourth Proportional to 39,858.60, 55,005.24 and 21,953.67

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Solution

The fourth proportional to 39,858.60, 55,005.24 and 21,953.67 is: 30,296.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,858.60 : 55,005.24 = 21,953.67 : x
  2. Step 2: Convert to fraction form
    39,858.60/55,005.24 = 21,953.67/x
  3. Step 3: Cross multiply
    39,858.60x = 55,005.24 × 21,953.67
  4. Step 4: Simplify right side
    39,858.60x = 1,207,566,887.23
  5. Step 5: Solve for x
    x = 1,207,566,887.23/39,858.60
  6. Step 6: Final answer
    x = 30,296.27

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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.