Home / 39,828.40-54,962.13-21,679.50

Finding the Fourth Proportional to 39,828.40, 54,962.13 and 21,679.50

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Solution

The fourth proportional to 39,828.40, 54,962.13 and 21,679.50 is: 29,917.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,828.40 : 54,962.13 = 21,679.50 : x
  2. Step 2: Convert to fraction form
    39,828.40/54,962.13 = 21,679.50/x
  3. Step 3: Cross multiply
    39,828.40x = 54,962.13 × 21,679.50
  4. Step 4: Simplify right side
    39,828.40x = 1,191,551,497.34
  5. Step 5: Solve for x
    x = 1,191,551,497.34/39,828.40
  6. Step 6: Final answer
    x = 29,917.13

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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.