Home / 13,748.36-18,972.72-7,779.92

Finding the Fourth Proportional to 13,748.36, 18,972.72 and 7,779.92

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Solution

The fourth proportional to 13,748.36, 18,972.72 and 7,779.92 is: 10,736.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,748.36 : 18,972.72 = 7,779.92 : x
  2. Step 2: Convert to fraction form
    13,748.36/18,972.72 = 7,779.92/x
  3. Step 3: Cross multiply
    13,748.36x = 18,972.72 × 7,779.92
  4. Step 4: Simplify right side
    13,748.36x = 147,606,148.92
  5. Step 5: Solve for x
    x = 147,606,148.92/13,748.36
  6. Step 6: Final answer
    x = 10,736.28

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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.