Home / 13,748.94-18,972.79-7,779.65

Finding the Fourth Proportional to 13,748.94, 18,972.79 and 7,779.65

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Solution

The fourth proportional to 13,748.94, 18,972.79 and 7,779.65 is: 10,735.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,748.94 : 18,972.79 = 7,779.65 : x
  2. Step 2: Convert to fraction form
    13,748.94/18,972.79 = 7,779.65/x
  3. Step 3: Cross multiply
    13,748.94x = 18,972.79 × 7,779.65
  4. Step 4: Simplify right side
    13,748.94x = 147,601,551.41
  5. Step 5: Solve for x
    x = 147,601,551.41/13,748.94
  6. Step 6: Final answer
    x = 10,735.49

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1.5x scale

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.