Home / 13,761.72-18,991.20-7,474.08

Finding the Fourth Proportional to 13,761.72, 18,991.20 and 7,474.08

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Solution

The fourth proportional to 13,761.72, 18,991.20 and 7,474.08 is: 10,314.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,761.72 : 18,991.20 = 7,474.08 : x
  2. Step 2: Convert to fraction form
    13,761.72/18,991.20 = 7,474.08/x
  3. Step 3: Cross multiply
    13,761.72x = 18,991.20 × 7,474.08
  4. Step 4: Simplify right side
    13,761.72x = 141,941,748.10
  5. Step 5: Solve for x
    x = 141,941,748.10/13,761.72
  6. Step 6: Final answer
    x = 10,314.24

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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.