Home / 39,591.36-54,636.71-21,688.07

Finding the Fourth Proportional to 39,591.36, 54,636.71 and 21,688.07

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Solution

The fourth proportional to 39,591.36, 54,636.71 and 21,688.07 is: 29,929.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,591.36 : 54,636.71 = 21,688.07 : x
  2. Step 2: Convert to fraction form
    39,591.36/54,636.71 = 21,688.07/x
  3. Step 3: Cross multiply
    39,591.36x = 54,636.71 × 21,688.07
  4. Step 4: Simplify right side
    39,591.36x = 1,184,964,409.43
  5. Step 5: Solve for x
    x = 1,184,964,409.43/39,591.36
  6. Step 6: Final answer
    x = 29,929.87

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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.