Home / 39,939.54-59,916.36-13,638.12

Finding the Fourth Proportional to 39,939.54, 59,916.36 and 13,638.12

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Solution

The fourth proportional to 39,939.54, 59,916.36 and 13,638.12 is: 20,459.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,939.54 : 59,916.36 = 13,638.12 : x
  2. Step 2: Convert to fraction form
    39,939.54/59,916.36 = 13,638.12/x
  3. Step 3: Cross multiply
    39,939.54x = 59,916.36 × 13,638.12
  4. Step 4: Simplify right side
    39,939.54x = 817,146,507.64
  5. Step 5: Solve for x
    x = 817,146,507.64/39,939.54
  6. Step 6: Final answer
    x = 20,459.59

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.