Home / 39,431.79-59,159.84-13,788.72

Finding the Fourth Proportional to 39,431.79, 59,159.84 and 13,788.72

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Solution

The fourth proportional to 39,431.79, 59,159.84 and 13,788.72 is: 20,687.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,431.79 : 59,159.84 = 13,788.72 : x
  2. Step 2: Convert to fraction form
    39,431.79/59,159.84 = 13,788.72/x
  3. Step 3: Cross multiply
    39,431.79x = 59,159.84 × 13,788.72
  4. Step 4: Simplify right side
    39,431.79x = 815,738,400.06
  5. Step 5: Solve for x
    x = 815,738,400.06/39,431.79
  6. Step 6: Final answer
    x = 20,687.33

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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.