Home / 39,688.45-54,772.00-21,783.26

Finding the Fourth Proportional to 39,688.45, 54,772.00 and 21,783.26

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Solution

The fourth proportional to 39,688.45, 54,772.00 and 21,783.26 is: 30,061.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,688.45 : 54,772.00 = 21,783.26 : x
  2. Step 2: Convert to fraction form
    39,688.45/54,772.00 = 21,783.26/x
  3. Step 3: Cross multiply
    39,688.45x = 54,772.00 × 21,783.26
  4. Step 4: Simplify right side
    39,688.45x = 1,193,112,799.19
  5. Step 5: Solve for x
    x = 1,193,112,799.19/39,688.45
  6. Step 6: Final answer
    x = 30,061.97

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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.