Home / 13,761.78-18,991.35-7,474.16

Finding the Fourth Proportional to 13,761.78, 18,991.35 and 7,474.16

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Solution

The fourth proportional to 13,761.78, 18,991.35 and 7,474.16 is: 10,314.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,761.78 : 18,991.35 = 7,474.16 : x
  2. Step 2: Convert to fraction form
    13,761.78/18,991.35 = 7,474.16/x
  3. Step 3: Cross multiply
    13,761.78x = 18,991.35 × 7,474.16
  4. Step 4: Simplify right side
    13,761.78x = 141,944,312.24
  5. Step 5: Solve for x
    x = 141,944,312.24/13,761.78
  6. Step 6: Final answer
    x = 10,314.39

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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.