Home / 13,317.72-19,979.70-3,957.81

Finding the Fourth Proportional to 13,317.72, 19,979.70 and 3,957.81

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Solution

The fourth proportional to 13,317.72, 19,979.70 and 3,957.81 is: 5,937.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,317.72 : 19,979.70 = 3,957.81 : x
  2. Step 2: Convert to fraction form
    13,317.72/19,979.70 = 3,957.81/x
  3. Step 3: Cross multiply
    13,317.72x = 19,979.70 × 3,957.81
  4. Step 4: Simplify right side
    13,317.72x = 79,075,856.46
  5. Step 5: Solve for x
    x = 79,075,856.46/13,317.72
  6. Step 6: Final answer
    x = 5,937.64

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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.